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Finding the Fourth Proportional to 7,175.52, 9,889.20 and 5,402.88

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Solution

The fourth proportional to 7,175.52, 9,889.20 and 5,402.88 is: 7,446.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,175.52 : 9,889.20 = 5,402.88 : x
  2. Step 2: Convert to fraction form
    7,175.52/9,889.20 = 5,402.88/x
  3. Step 3: Cross multiply
    7,175.52x = 9,889.20 × 5,402.88
  4. Step 4: Simplify right side
    7,175.52x = 53,430,160.90
  5. Step 5: Solve for x
    x = 53,430,160.90/7,175.52
  6. Step 6: Final answer
    x = 7,446.17

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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.