Home / 20,639.98-30,949.49-8,789.18

Finding the Fourth Proportional to 20,639.98, 30,949.49 and 8,789.18

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Solution

The fourth proportional to 20,639.98, 30,949.49 and 8,789.18 is: 13,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.98 : 30,949.49 = 8,789.18 : x
  2. Step 2: Convert to fraction form
    20,639.98/30,949.49 = 8,789.18/x
  3. Step 3: Cross multiply
    20,639.98x = 30,949.49 × 8,789.18
  4. Step 4: Simplify right side
    20,639.98x = 272,020,505.74
  5. Step 5: Solve for x
    x = 272,020,505.74/20,639.98
  6. Step 6: Final answer
    x = 13,179.30

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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.