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Finding the Fourth Proportional to 14,832.80, 20,471.60 and 8,869.12

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Solution

The fourth proportional to 14,832.80, 20,471.60 and 8,869.12 is: 12,240.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,832.80 : 20,471.60 = 8,869.12 : x
  2. Step 2: Convert to fraction form
    14,832.80/20,471.60 = 8,869.12/x
  3. Step 3: Cross multiply
    14,832.80x = 20,471.60 × 8,869.12
  4. Step 4: Simplify right side
    14,832.80x = 181,565,076.99
  5. Step 5: Solve for x
    x = 181,565,076.99/14,832.80
  6. Step 6: Final answer
    x = 12,240.78

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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.