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Finding the Fourth Proportional to 28,017, 38,663.46 and 15,442.56

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Solution

The fourth proportional to 28,017, 38,663.46 and 15,442.56 is: 21,310.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,017 : 38,663.46 = 15,442.56 : x
  2. Step 2: Convert to fraction form
    28,017/38,663.46 = 15,442.56/x
  3. Step 3: Cross multiply
    28,017x = 38,663.46 × 15,442.56
  4. Step 4: Simplify right side
    28,017x = 597,062,800.86
  5. Step 5: Solve for x
    x = 597,062,800.86/28,017
  6. Step 6: Final answer
    x = 21,310.73

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Half scale
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Double scale
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Similar ratio
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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.