Home / 19,820.88-29,721.24-8,722.80

Finding the Fourth Proportional to 19,820.88, 29,721.24 and 8,722.80

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Solution

The fourth proportional to 19,820.88, 29,721.24 and 8,722.80 is: 13,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.88 : 29,721.24 = 8,722.80 : x
  2. Step 2: Convert to fraction form
    19,820.88/29,721.24 = 8,722.80/x
  3. Step 3: Cross multiply
    19,820.88x = 29,721.24 × 8,722.80
  4. Step 4: Simplify right side
    19,820.88x = 259,252,432.27
  5. Step 5: Solve for x
    x = 259,252,432.27/19,820.88
  6. Step 6: Final answer
    x = 13,079.76

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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.