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Finding the Fourth Proportional to 13,987.80, 20,966.04 and 10,714.32

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Solution

The fourth proportional to 13,987.80, 20,966.04 and 10,714.32 is: 16,059.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.80 : 20,966.04 = 10,714.32 : x
  2. Step 2: Convert to fraction form
    13,987.80/20,966.04 = 10,714.32/x
  3. Step 3: Cross multiply
    13,987.80x = 20,966.04 × 10,714.32
  4. Step 4: Simplify right side
    13,987.80x = 224,636,861.69
  5. Step 5: Solve for x
    x = 224,636,861.69/13,987.80
  6. Step 6: Final answer
    x = 16,059.48

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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.