Home / 39,871.80-59,856.30-20,140.20

Finding the Fourth Proportional to 39,871.80, 59,856.30 and 20,140.20

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Solution

The fourth proportional to 39,871.80, 59,856.30 and 20,140.20 is: 30,234.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,871.80 : 59,856.30 = 20,140.20 : x
  2. Step 2: Convert to fraction form
    39,871.80/59,856.30 = 20,140.20/x
  3. Step 3: Cross multiply
    39,871.80x = 59,856.30 × 20,140.20
  4. Step 4: Simplify right side
    39,871.80x = 1,205,517,853.26
  5. Step 5: Solve for x
    x = 1,205,517,853.26/39,871.80
  6. Step 6: Final answer
    x = 30,234.85

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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.