Home / 13,385.28-18,472.64-8,079.80

Finding the Fourth Proportional to 13,385.28, 18,472.64 and 8,079.80

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Solution

The fourth proportional to 13,385.28, 18,472.64 and 8,079.80 is: 11,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.28 : 18,472.64 = 8,079.80 : x
  2. Step 2: Convert to fraction form
    13,385.28/18,472.64 = 8,079.80/x
  3. Step 3: Cross multiply
    13,385.28x = 18,472.64 × 8,079.80
  4. Step 4: Simplify right side
    13,385.28x = 149,255,236.67
  5. Step 5: Solve for x
    x = 149,255,236.67/13,385.28
  6. Step 6: Final answer
    x = 11,150.70

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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.