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Finding the Fourth Proportional to 28,573.42, 42,860.12 and 12,995.50

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Solution

The fourth proportional to 28,573.42, 42,860.12 and 12,995.50 is: 19,493.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,573.42 : 42,860.12 = 12,995.50 : x
  2. Step 2: Convert to fraction form
    28,573.42/42,860.12 = 12,995.50/x
  3. Step 3: Cross multiply
    28,573.42x = 42,860.12 × 12,995.50
  4. Step 4: Simplify right side
    28,573.42x = 556,988,689.46
  5. Step 5: Solve for x
    x = 556,988,689.46/28,573.42
  6. Step 6: Final answer
    x = 19,493.25

Related Problems

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Half scale
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Double scale
Find fourth proportional to 28,574.42, 42,861.62 and 12,996.50
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.