Home / 12,939.10-17,857.45-7,197.14

Finding the Fourth Proportional to 12,939.10, 17,857.45 and 7,197.14

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Solution

The fourth proportional to 12,939.10, 17,857.45 and 7,197.14 is: 9,932.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.10 : 17,857.45 = 7,197.14 : x
  2. Step 2: Convert to fraction form
    12,939.10/17,857.45 = 7,197.14/x
  3. Step 3: Cross multiply
    12,939.10x = 17,857.45 × 7,197.14
  4. Step 4: Simplify right side
    12,939.10x = 128,522,442.42
  5. Step 5: Solve for x
    x = 128,522,442.42/12,939.10
  6. Step 6: Final answer
    x = 9,932.87

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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.