Home / 20,823.28-31,234.96-5,240.80

Finding the Fourth Proportional to 20,823.28, 31,234.96 and 5,240.80

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Solution

The fourth proportional to 20,823.28, 31,234.96 and 5,240.80 is: 7,861.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.28 : 31,234.96 = 5,240.80 : x
  2. Step 2: Convert to fraction form
    20,823.28/31,234.96 = 5,240.80/x
  3. Step 3: Cross multiply
    20,823.28x = 31,234.96 × 5,240.80
  4. Step 4: Simplify right side
    20,823.28x = 163,696,178.37
  5. Step 5: Solve for x
    x = 163,696,178.37/20,823.28
  6. Step 6: Final answer
    x = 7,861.21

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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.