Home / 31,715.28-43,764.12-18,965.88

Finding the Fourth Proportional to 31,715.28, 43,764.12 and 18,965.88

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Solution

The fourth proportional to 31,715.28, 43,764.12 and 18,965.88 is: 26,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,715.28 : 43,764.12 = 18,965.88 : x
  2. Step 2: Convert to fraction form
    31,715.28/43,764.12 = 18,965.88/x
  3. Step 3: Cross multiply
    31,715.28x = 43,764.12 × 18,965.88
  4. Step 4: Simplify right side
    31,715.28x = 830,025,048.23
  5. Step 5: Solve for x
    x = 830,025,048.23/31,715.28
  6. Step 6: Final answer
    x = 26,171.14

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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.