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Finding the Fourth Proportional to 10,354.30, 15,531.45 and 5,425.45

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Solution

The fourth proportional to 10,354.30, 15,531.45 and 5,425.45 is: 8,138.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,354.30 : 15,531.45 = 5,425.45 : x
  2. Step 2: Convert to fraction form
    10,354.30/15,531.45 = 5,425.45/x
  3. Step 3: Cross multiply
    10,354.30x = 15,531.45 × 5,425.45
  4. Step 4: Simplify right side
    10,354.30x = 84,265,105.40
  5. Step 5: Solve for x
    x = 84,265,105.40/10,354.30
  6. Step 6: Final answer
    x = 8,138.18

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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.