Home / 13,385.12-18,471.95-8,078.91

Finding the Fourth Proportional to 13,385.12, 18,471.95 and 8,078.91

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Solution

The fourth proportional to 13,385.12, 18,471.95 and 8,078.91 is: 11,149.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.12 : 18,471.95 = 8,078.91 : x
  2. Step 2: Convert to fraction form
    13,385.12/18,471.95 = 8,078.91/x
  3. Step 3: Cross multiply
    13,385.12x = 18,471.95 × 8,078.91
  4. Step 4: Simplify right side
    13,385.12x = 149,233,221.57
  5. Step 5: Solve for x
    x = 149,233,221.57/13,385.12
  6. Step 6: Final answer
    x = 11,149.19

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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.