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Finding the Fourth Proportional to 18,713.92, 28,085.14 and 6,878.90

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Solution

The fourth proportional to 18,713.92, 28,085.14 and 6,878.90 is: 10,323.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.92 : 28,085.14 = 6,878.90 : x
  2. Step 2: Convert to fraction form
    18,713.92/28,085.14 = 6,878.90/x
  3. Step 3: Cross multiply
    18,713.92x = 28,085.14 × 6,878.90
  4. Step 4: Simplify right side
    18,713.92x = 193,194,869.55
  5. Step 5: Solve for x
    x = 193,194,869.55/18,713.92
  6. Step 6: Final answer
    x = 10,323.59

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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.