Home / 20,921.68-31,382.51-6,130.59

Finding the Fourth Proportional to 20,921.68, 31,382.51 and 6,130.59

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Solution

The fourth proportional to 20,921.68, 31,382.51 and 6,130.59 is: 9,195.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.68 : 31,382.51 = 6,130.59 : x
  2. Step 2: Convert to fraction form
    20,921.68/31,382.51 = 6,130.59/x
  3. Step 3: Cross multiply
    20,921.68x = 31,382.51 × 6,130.59
  4. Step 4: Simplify right side
    20,921.68x = 192,393,301.98
  5. Step 5: Solve for x
    x = 192,393,301.98/20,921.68
  6. Step 6: Final answer
    x = 9,195.88

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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.