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Finding the Fourth Proportional to 10,866.80, 14,974.68 and 7,714.16

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Solution

The fourth proportional to 10,866.80, 14,974.68 and 7,714.16 is: 10,630.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,866.80 : 14,974.68 = 7,714.16 : x
  2. Step 2: Convert to fraction form
    10,866.80/14,974.68 = 7,714.16/x
  3. Step 3: Cross multiply
    10,866.80x = 14,974.68 × 7,714.16
  4. Step 4: Simplify right side
    10,866.80x = 115,517,077.47
  5. Step 5: Solve for x
    x = 115,517,077.47/10,866.80
  6. Step 6: Final answer
    x = 10,630.28

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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.