Home / 21,191.52-31,790.25-6,398.76

Finding the Fourth Proportional to 21,191.52, 31,790.25 and 6,398.76

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Solution

The fourth proportional to 21,191.52, 31,790.25 and 6,398.76 is: 9,599.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.52 : 31,790.25 = 6,398.76 : x
  2. Step 2: Convert to fraction form
    21,191.52/31,790.25 = 6,398.76/x
  3. Step 3: Cross multiply
    21,191.52x = 31,790.25 × 6,398.76
  4. Step 4: Simplify right side
    21,191.52x = 203,418,180.09
  5. Step 5: Solve for x
    x = 203,418,180.09/21,191.52
  6. Step 6: Final answer
    x = 9,599.04

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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.