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Finding the Fourth Proportional to 28,188.39, 38,901.18 and 15,613.14

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Solution

The fourth proportional to 28,188.39, 38,901.18 and 15,613.14 is: 21,546.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.39 : 38,901.18 = 15,613.14 : x
  2. Step 2: Convert to fraction form
    28,188.39/38,901.18 = 15,613.14/x
  3. Step 3: Cross multiply
    28,188.39x = 38,901.18 × 15,613.14
  4. Step 4: Simplify right side
    28,188.39x = 607,369,569.51
  5. Step 5: Solve for x
    x = 607,369,569.51/28,188.39
  6. Step 6: Final answer
    x = 21,546.80

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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.