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Finding the Fourth Proportional to 10,339.20, 15,508.80 and 7,714.80

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Solution

The fourth proportional to 10,339.20, 15,508.80 and 7,714.80 is: 11,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,339.20 : 15,508.80 = 7,714.80 : x
  2. Step 2: Convert to fraction form
    10,339.20/15,508.80 = 7,714.80/x
  3. Step 3: Cross multiply
    10,339.20x = 15,508.80 × 7,714.80
  4. Step 4: Simplify right side
    10,339.20x = 119,647,290.24
  5. Step 5: Solve for x
    x = 119,647,290.24/10,339.20
  6. Step 6: Final answer
    x = 11,572.20

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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.