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Finding the Fourth Proportional to 18,827.76, 28,251.54 and 8,965.20

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Solution

The fourth proportional to 18,827.76, 28,251.54 and 8,965.20 is: 13,452.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,827.76 : 28,251.54 = 8,965.20 : x
  2. Step 2: Convert to fraction form
    18,827.76/28,251.54 = 8,965.20/x
  3. Step 3: Cross multiply
    18,827.76x = 28,251.54 × 8,965.20
  4. Step 4: Simplify right side
    18,827.76x = 253,280,706.41
  5. Step 5: Solve for x
    x = 253,280,706.41/18,827.76
  6. Step 6: Final answer
    x = 13,452.51

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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.