Home / 20,819.12-31,035.88-20,499.44

Finding the Fourth Proportional to 20,819.12, 31,035.88 and 20,499.44

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Solution

The fourth proportional to 20,819.12, 31,035.88 and 20,499.44 is: 30,559.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.12 : 31,035.88 = 20,499.44 : x
  2. Step 2: Convert to fraction form
    20,819.12/31,035.88 = 20,499.44/x
  3. Step 3: Cross multiply
    20,819.12x = 31,035.88 × 20,499.44
  4. Step 4: Simplify right side
    20,819.12x = 636,218,159.91
  5. Step 5: Solve for x
    x = 636,218,159.91/20,819.12
  6. Step 6: Final answer
    x = 30,559.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.