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Finding the Fourth Proportional to 12,566.88, 18,850.32 and 4,781.16

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Solution

The fourth proportional to 12,566.88, 18,850.32 and 4,781.16 is: 7,171.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,566.88 : 18,850.32 = 4,781.16 : x
  2. Step 2: Convert to fraction form
    12,566.88/18,850.32 = 4,781.16/x
  3. Step 3: Cross multiply
    12,566.88x = 18,850.32 × 4,781.16
  4. Step 4: Simplify right side
    12,566.88x = 90,126,395.97
  5. Step 5: Solve for x
    x = 90,126,395.97/12,566.88
  6. Step 6: Final answer
    x = 7,171.74

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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.