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Finding the Fourth Proportional to 14,869.72, 20,520.48 and 8,155.29

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Solution

The fourth proportional to 14,869.72, 20,520.48 and 8,155.29 is: 11,254.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,869.72 : 20,520.48 = 8,155.29 : x
  2. Step 2: Convert to fraction form
    14,869.72/20,520.48 = 8,155.29/x
  3. Step 3: Cross multiply
    14,869.72x = 20,520.48 × 8,155.29
  4. Step 4: Simplify right side
    14,869.72x = 167,350,321.96
  5. Step 5: Solve for x
    x = 167,350,321.96/14,869.72
  6. Step 6: Final answer
    x = 11,254.44

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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.