Home / 20,812.75-31,219.13-6,220.75

Finding the Fourth Proportional to 20,812.75, 31,219.13 and 6,220.75

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Solution

The fourth proportional to 20,812.75, 31,219.13 and 6,220.75 is: 9,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.75 : 31,219.13 = 6,220.75 : x
  2. Step 2: Convert to fraction form
    20,812.75/31,219.13 = 6,220.75/x
  3. Step 3: Cross multiply
    20,812.75x = 31,219.13 × 6,220.75
  4. Step 4: Simplify right side
    20,812.75x = 194,206,402.95
  5. Step 5: Solve for x
    x = 194,206,402.95/20,812.75
  6. Step 6: Final answer
    x = 9,331.13

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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.