Home / 20,853.99-28,778.22-11,422.62

Finding the Fourth Proportional to 20,853.99, 28,778.22 and 11,422.62

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Solution

The fourth proportional to 20,853.99, 28,778.22 and 11,422.62 is: 15,763.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.99 : 28,778.22 = 11,422.62 : x
  2. Step 2: Convert to fraction form
    20,853.99/28,778.22 = 11,422.62/x
  3. Step 3: Cross multiply
    20,853.99x = 28,778.22 × 11,422.62
  4. Step 4: Simplify right side
    20,853.99x = 328,722,671.34
  5. Step 5: Solve for x
    x = 328,722,671.34/20,853.99
  6. Step 6: Final answer
    x = 15,763.06

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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.