Home / 13,385.88-18,472.14-8,078.76

Finding the Fourth Proportional to 13,385.88, 18,472.14 and 8,078.76

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Solution

The fourth proportional to 13,385.88, 18,472.14 and 8,078.76 is: 11,148.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.88 : 18,472.14 = 8,078.76 : x
  2. Step 2: Convert to fraction form
    13,385.88/18,472.14 = 8,078.76/x
  3. Step 3: Cross multiply
    13,385.88x = 18,472.14 × 8,078.76
  4. Step 4: Simplify right side
    13,385.88x = 149,231,985.75
  5. Step 5: Solve for x
    x = 149,231,985.75/13,385.88
  6. Step 6: Final answer
    x = 11,148.46

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Double scale
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Similar ratio
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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.