Home / 21,131.12-31,701.68-6,899.52

Finding the Fourth Proportional to 21,131.12, 31,701.68 and 6,899.52

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Solution

The fourth proportional to 21,131.12, 31,701.68 and 6,899.52 is: 10,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.12 : 31,701.68 = 6,899.52 : x
  2. Step 2: Convert to fraction form
    21,131.12/31,701.68 = 6,899.52/x
  3. Step 3: Cross multiply
    21,131.12x = 31,701.68 × 6,899.52
  4. Step 4: Simplify right side
    21,131.12x = 218,726,340.70
  5. Step 5: Solve for x
    x = 218,726,340.70/21,131.12
  6. Step 6: Final answer
    x = 10,350.91

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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.