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Finding the Fourth Proportional to 18,730.01, 28,084.14 and 8,869.20

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Solution

The fourth proportional to 18,730.01, 28,084.14 and 8,869.20 is: 13,298.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.01 : 28,084.14 = 8,869.20 : x
  2. Step 2: Convert to fraction form
    18,730.01/28,084.14 = 8,869.20/x
  3. Step 3: Cross multiply
    18,730.01x = 28,084.14 × 8,869.20
  4. Step 4: Simplify right side
    18,730.01x = 249,083,854.49
  5. Step 5: Solve for x
    x = 249,083,854.49/18,730.01
  6. Step 6: Final answer
    x = 13,298.65

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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.