Home / 42,085.80-63,105.21-20,982.87

Finding the Fourth Proportional to 42,085.80, 63,105.21 and 20,982.87

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Solution

The fourth proportional to 42,085.80, 63,105.21 and 20,982.87 is: 31,462.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,085.80 : 63,105.21 = 20,982.87 : x
  2. Step 2: Convert to fraction form
    42,085.80/63,105.21 = 20,982.87/x
  3. Step 3: Cross multiply
    42,085.80x = 63,105.21 × 20,982.87
  4. Step 4: Simplify right side
    42,085.80x = 1,324,128,417.75
  5. Step 5: Solve for x
    x = 1,324,128,417.75/42,085.80
  6. Step 6: Final answer
    x = 31,462.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.