Home / 20,823.13-31,234.60-5,240.76

Finding the Fourth Proportional to 20,823.13, 31,234.60 and 5,240.76

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Solution

The fourth proportional to 20,823.13, 31,234.60 and 5,240.76 is: 7,861.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.13 : 31,234.60 = 5,240.76 : x
  2. Step 2: Convert to fraction form
    20,823.13/31,234.60 = 5,240.76/x
  3. Step 3: Cross multiply
    20,823.13x = 31,234.60 × 5,240.76
  4. Step 4: Simplify right side
    20,823.13x = 163,693,042.30
  5. Step 5: Solve for x
    x = 163,693,042.30/20,823.13
  6. Step 6: Final answer
    x = 7,861.12

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1.5x scale

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.