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Finding the Fourth Proportional to 14,287.66, 21,451.18 and 7,272.42

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Solution

The fourth proportional to 14,287.66, 21,451.18 and 7,272.42 is: 10,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.66 : 21,451.18 = 7,272.42 : x
  2. Step 2: Convert to fraction form
    14,287.66/21,451.18 = 7,272.42/x
  3. Step 3: Cross multiply
    14,287.66x = 21,451.18 × 7,272.42
  4. Step 4: Simplify right side
    14,287.66x = 156,001,990.46
  5. Step 5: Solve for x
    x = 156,001,990.46/14,287.66
  6. Step 6: Final answer
    x = 10,918.65

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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.