Home / 12,418.30-17,135.58-7,380.69

Finding the Fourth Proportional to 12,418.30, 17,135.58 and 7,380.69

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Solution

The fourth proportional to 12,418.30, 17,135.58 and 7,380.69 is: 10,184.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.30 : 17,135.58 = 7,380.69 : x
  2. Step 2: Convert to fraction form
    12,418.30/17,135.58 = 7,380.69/x
  3. Step 3: Cross multiply
    12,418.30x = 17,135.58 × 7,380.69
  4. Step 4: Simplify right side
    12,418.30x = 126,472,403.95
  5. Step 5: Solve for x
    x = 126,472,403.95/12,418.30
  6. Step 6: Final answer
    x = 10,184.36

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Half scale
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Double scale
Find fourth proportional to 12,419.30, 17,136.96 and 7,381.69
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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.