Home / 31,143.58-42,979.09-17,716.78

Finding the Fourth Proportional to 31,143.58, 42,979.09 and 17,716.78

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Solution

The fourth proportional to 31,143.58, 42,979.09 and 17,716.78 is: 24,449.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,143.58 : 42,979.09 = 17,716.78 : x
  2. Step 2: Convert to fraction form
    31,143.58/42,979.09 = 17,716.78/x
  3. Step 3: Cross multiply
    31,143.58x = 42,979.09 × 17,716.78
  4. Step 4: Simplify right side
    31,143.58x = 761,451,082.13
  5. Step 5: Solve for x
    x = 761,451,082.13/31,143.58
  6. Step 6: Final answer
    x = 24,449.70

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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.