Home / 28,159.84-42,239.76-12,588.32

Finding the Fourth Proportional to 28,159.84, 42,239.76 and 12,588.32

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Solution

The fourth proportional to 28,159.84, 42,239.76 and 12,588.32 is: 18,882.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.84 : 42,239.76 = 12,588.32 : x
  2. Step 2: Convert to fraction form
    28,159.84/42,239.76 = 12,588.32/x
  3. Step 3: Cross multiply
    28,159.84x = 42,239.76 × 12,588.32
  4. Step 4: Simplify right side
    28,159.84x = 531,727,615.60
  5. Step 5: Solve for x
    x = 531,727,615.60/28,159.84
  6. Step 6: Final answer
    x = 18,882.48

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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.