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Finding the Fourth Proportional to 15,122.49, 20,869.12 and 9,152.66

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Solution

The fourth proportional to 15,122.49, 20,869.12 and 9,152.66 is: 12,630.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.49 : 20,869.12 = 9,152.66 : x
  2. Step 2: Convert to fraction form
    15,122.49/20,869.12 = 9,152.66/x
  3. Step 3: Cross multiply
    15,122.49x = 20,869.12 × 9,152.66
  4. Step 4: Simplify right side
    15,122.49x = 191,007,989.15
  5. Step 5: Solve for x
    x = 191,007,989.15/15,122.49
  6. Step 6: Final answer
    x = 12,630.72

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