Home / 21,814.20-32,721.30-13,519.80

Finding the Fourth Proportional to 21,814.20, 32,721.30 and 13,519.80

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Solution

The fourth proportional to 21,814.20, 32,721.30 and 13,519.80 is: 20,279.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.20 : 32,721.30 = 13,519.80 : x
  2. Step 2: Convert to fraction form
    21,814.20/32,721.30 = 13,519.80/x
  3. Step 3: Cross multiply
    21,814.20x = 32,721.30 × 13,519.80
  4. Step 4: Simplify right side
    21,814.20x = 442,385,431.74
  5. Step 5: Solve for x
    x = 442,385,431.74/21,814.20
  6. Step 6: Final answer
    x = 20,279.70

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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.