Home / 18,781.12-28,146.80-9,997.12

Finding the Fourth Proportional to 18,781.12, 28,146.80 and 9,997.12

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Solution

The fourth proportional to 18,781.12, 28,146.80 and 9,997.12 is: 14,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.12 : 28,146.80 = 9,997.12 : x
  2. Step 2: Convert to fraction form
    18,781.12/28,146.80 = 9,997.12/x
  3. Step 3: Cross multiply
    18,781.12x = 28,146.80 × 9,997.12
  4. Step 4: Simplify right side
    18,781.12x = 281,386,937.22
  5. Step 5: Solve for x
    x = 281,386,937.22/18,781.12
  6. Step 6: Final answer
    x = 14,982.44

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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.