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Finding the Fourth Proportional to 18,821.71, 28,248.09 and 9,464.39

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Solution

The fourth proportional to 18,821.71, 28,248.09 and 9,464.39 is: 14,204.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.71 : 28,248.09 = 9,464.39 : x
  2. Step 2: Convert to fraction form
    18,821.71/28,248.09 = 9,464.39/x
  3. Step 3: Cross multiply
    18,821.71x = 28,248.09 × 9,464.39
  4. Step 4: Simplify right side
    18,821.71x = 267,350,940.52
  5. Step 5: Solve for x
    x = 267,350,940.52/18,821.71
  6. Step 6: Final answer
    x = 14,204.39

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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.