Home / 12,438.18-17,159.14-8,403.71

Finding the Fourth Proportional to 12,438.18, 17,159.14 and 8,403.71

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Solution

The fourth proportional to 12,438.18, 17,159.14 and 8,403.71 is: 11,593.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.18 : 17,159.14 = 8,403.71 : x
  2. Step 2: Convert to fraction form
    12,438.18/17,159.14 = 8,403.71/x
  3. Step 3: Cross multiply
    12,438.18x = 17,159.14 × 8,403.71
  4. Step 4: Simplify right side
    12,438.18x = 144,200,313.85
  5. Step 5: Solve for x
    x = 144,200,313.85/12,438.18
  6. Step 6: Final answer
    x = 11,593.36

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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.