Home / 15,990.91-22,067.70-8,820.79

Finding the Fourth Proportional to 15,990.91, 22,067.70 and 8,820.79

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Solution

The fourth proportional to 15,990.91, 22,067.70 and 8,820.79 is: 12,172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.91 : 22,067.70 = 8,820.79 : x
  2. Step 2: Convert to fraction form
    15,990.91/22,067.70 = 8,820.79/x
  3. Step 3: Cross multiply
    15,990.91x = 22,067.70 × 8,820.79
  4. Step 4: Simplify right side
    15,990.91x = 194,654,547.48
  5. Step 5: Solve for x
    x = 194,654,547.48/15,990.91
  6. Step 6: Final answer
    x = 12,172.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.