Home / 12,375.12-17,071.92-8,130.72

Finding the Fourth Proportional to 12,375.12, 17,071.92 and 8,130.72

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Solution

The fourth proportional to 12,375.12, 17,071.92 and 8,130.72 is: 11,216.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.12 : 17,071.92 = 8,130.72 : x
  2. Step 2: Convert to fraction form
    12,375.12/17,071.92 = 8,130.72/x
  3. Step 3: Cross multiply
    12,375.12x = 17,071.92 × 8,130.72
  4. Step 4: Simplify right side
    12,375.12x = 138,807,001.38
  5. Step 5: Solve for x
    x = 138,807,001.38/12,375.12
  6. Step 6: Final answer
    x = 11,216.62

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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.