Home / 12,387.12-17,095.44-7,082.72

Finding the Fourth Proportional to 12,387.12, 17,095.44 and 7,082.72

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Solution

The fourth proportional to 12,387.12, 17,095.44 and 7,082.72 is: 9,774.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.12 : 17,095.44 = 7,082.72 : x
  2. Step 2: Convert to fraction form
    12,387.12/17,095.44 = 7,082.72/x
  3. Step 3: Cross multiply
    12,387.12x = 17,095.44 × 7,082.72
  4. Step 4: Simplify right side
    12,387.12x = 121,082,214.80
  5. Step 5: Solve for x
    x = 121,082,214.80/12,387.12
  6. Step 6: Final answer
    x = 9,774.85

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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.