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Finding the Fourth Proportional to 18,711.11, 28,080.94 and 6,876.10

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Solution

The fourth proportional to 18,711.11, 28,080.94 and 6,876.10 is: 10,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.11 : 28,080.94 = 6,876.10 : x
  2. Step 2: Convert to fraction form
    18,711.11/28,080.94 = 6,876.10/x
  3. Step 3: Cross multiply
    18,711.11x = 28,080.94 × 6,876.10
  4. Step 4: Simplify right side
    18,711.11x = 193,087,351.53
  5. Step 5: Solve for x
    x = 193,087,351.53/18,711.11
  6. Step 6: Final answer
    x = 10,319.40

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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.