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Finding the Fourth Proportional to 28,398.59, 42,597.40 and 8,407.99

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Solution

The fourth proportional to 28,398.59, 42,597.40 and 8,407.99 is: 12,611.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.59 : 42,597.40 = 8,407.99 : x
  2. Step 2: Convert to fraction form
    28,398.59/42,597.40 = 8,407.99/x
  3. Step 3: Cross multiply
    28,398.59x = 42,597.40 × 8,407.99
  4. Step 4: Simplify right side
    28,398.59x = 358,158,513.23
  5. Step 5: Solve for x
    x = 358,158,513.23/28,398.59
  6. Step 6: Final answer
    x = 12,611.84

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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.