Home / 21,306.61-31,959.90-8,158.97

Finding the Fourth Proportional to 21,306.61, 31,959.90 and 8,158.97

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Solution

The fourth proportional to 21,306.61, 31,959.90 and 8,158.97 is: 12,238.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.61 : 31,959.90 = 8,158.97 : x
  2. Step 2: Convert to fraction form
    21,306.61/31,959.90 = 8,158.97/x
  3. Step 3: Cross multiply
    21,306.61x = 31,959.90 × 8,158.97
  4. Step 4: Simplify right side
    21,306.61x = 260,759,945.20
  5. Step 5: Solve for x
    x = 260,759,945.20/21,306.61
  6. Step 6: Final answer
    x = 12,238.45

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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.