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Finding the Fourth Proportional to 18,753.27, 28,117.35 and 7,656.95

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Solution

The fourth proportional to 18,753.27, 28,117.35 and 7,656.95 is: 11,480.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.27 : 28,117.35 = 7,656.95 : x
  2. Step 2: Convert to fraction form
    18,753.27/28,117.35 = 7,656.95/x
  3. Step 3: Cross multiply
    18,753.27x = 28,117.35 × 7,656.95
  4. Step 4: Simplify right side
    18,753.27x = 215,293,002.50
  5. Step 5: Solve for x
    x = 215,293,002.50/18,753.27
  6. Step 6: Final answer
    x = 11,480.29

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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.