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Finding the Fourth Proportional to 13,732.78, 18,951.18 and 7,445.14

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Solution

The fourth proportional to 13,732.78, 18,951.18 and 7,445.14 is: 10,274.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,732.78 : 18,951.18 = 7,445.14 : x
  2. Step 2: Convert to fraction form
    13,732.78/18,951.18 = 7,445.14/x
  3. Step 3: Cross multiply
    13,732.78x = 18,951.18 × 7,445.14
  4. Step 4: Simplify right side
    13,732.78x = 141,094,188.27
  5. Step 5: Solve for x
    x = 141,094,188.27/13,732.78
  6. Step 6: Final answer
    x = 10,274.26

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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.