Home / 28,715.60-39,618.38-17,381.47

Finding the Fourth Proportional to 28,715.60, 39,618.38 and 17,381.47

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Solution

The fourth proportional to 28,715.60, 39,618.38 and 17,381.47 is: 23,980.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.60 : 39,618.38 = 17,381.47 : x
  2. Step 2: Convert to fraction form
    28,715.60/39,618.38 = 17,381.47/x
  3. Step 3: Cross multiply
    28,715.60x = 39,618.38 × 17,381.47
  4. Step 4: Simplify right side
    28,715.60x = 688,625,398.42
  5. Step 5: Solve for x
    x = 688,625,398.42/28,715.60
  6. Step 6: Final answer
    x = 23,980.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.