Home / 31,082.18-42,864.45-20,453.36

Finding the Fourth Proportional to 31,082.18, 42,864.45 and 20,453.36

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Solution

The fourth proportional to 31,082.18, 42,864.45 and 20,453.36 is: 28,206.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,082.18 : 42,864.45 = 20,453.36 : x
  2. Step 2: Convert to fraction form
    31,082.18/42,864.45 = 20,453.36/x
  3. Step 3: Cross multiply
    31,082.18x = 42,864.45 × 20,453.36
  4. Step 4: Simplify right side
    31,082.18x = 876,722,027.05
  5. Step 5: Solve for x
    x = 876,722,027.05/31,082.18
  6. Step 6: Final answer
    x = 28,206.58

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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.