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Finding the Fourth Proportional to 15,167.84, 20,930.94 and 8,454.20

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Solution

The fourth proportional to 15,167.84, 20,930.94 and 8,454.20 is: 11,666.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,167.84 : 20,930.94 = 8,454.20 : x
  2. Step 2: Convert to fraction form
    15,167.84/20,930.94 = 8,454.20/x
  3. Step 3: Cross multiply
    15,167.84x = 20,930.94 × 8,454.20
  4. Step 4: Simplify right side
    15,167.84x = 176,954,248.29
  5. Step 5: Solve for x
    x = 176,954,248.29/15,167.84
  6. Step 6: Final answer
    x = 11,666.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.