Home / 12,438.40-17,165.11-7,132.19

Finding the Fourth Proportional to 12,438.40, 17,165.11 and 7,132.19

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Solution

The fourth proportional to 12,438.40, 17,165.11 and 7,132.19 is: 9,842.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.40 : 17,165.11 = 7,132.19 : x
  2. Step 2: Convert to fraction form
    12,438.40/17,165.11 = 7,132.19/x
  3. Step 3: Cross multiply
    12,438.40x = 17,165.11 × 7,132.19
  4. Step 4: Simplify right side
    12,438.40x = 122,424,825.89
  5. Step 5: Solve for x
    x = 122,424,825.89/12,438.40
  6. Step 6: Final answer
    x = 9,842.49

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Half scale
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Double scale
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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.