Home / 12,425.12-17,132.30-9,905.26

Finding the Fourth Proportional to 12,425.12, 17,132.30 and 9,905.26

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Solution

The fourth proportional to 12,425.12, 17,132.30 and 9,905.26 is: 13,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.12 : 17,132.30 = 9,905.26 : x
  2. Step 2: Convert to fraction form
    12,425.12/17,132.30 = 9,905.26/x
  3. Step 3: Cross multiply
    12,425.12x = 17,132.30 × 9,905.26
  4. Step 4: Simplify right side
    12,425.12x = 169,699,885.90
  5. Step 5: Solve for x
    x = 169,699,885.90/12,425.12
  6. Step 6: Final answer
    x = 13,657.81

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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.