Home / 31,059.30-42,855.24-20,319.90

Finding the Fourth Proportional to 31,059.30, 42,855.24 and 20,319.90

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Solution

The fourth proportional to 31,059.30, 42,855.24 and 20,319.90 is: 28,037.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,059.30 : 42,855.24 = 20,319.90 : x
  2. Step 2: Convert to fraction form
    31,059.30/42,855.24 = 20,319.90/x
  3. Step 3: Cross multiply
    31,059.30x = 42,855.24 × 20,319.90
  4. Step 4: Simplify right side
    31,059.30x = 870,814,191.28
  5. Step 5: Solve for x
    x = 870,814,191.28/31,059.30
  6. Step 6: Final answer
    x = 28,037.15

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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.