Home / 20,722.88-31,086.31-8,240.13

Finding the Fourth Proportional to 20,722.88, 31,086.31 and 8,240.13

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Solution

The fourth proportional to 20,722.88, 31,086.31 and 8,240.13 is: 12,360.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.88 : 31,086.31 = 8,240.13 : x
  2. Step 2: Convert to fraction form
    20,722.88/31,086.31 = 8,240.13/x
  3. Step 3: Cross multiply
    20,722.88x = 31,086.31 × 8,240.13
  4. Step 4: Simplify right side
    20,722.88x = 256,155,080.19
  5. Step 5: Solve for x
    x = 256,155,080.19/20,722.88
  6. Step 6: Final answer
    x = 12,360.98

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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.