Home / 20,139.50-30,215.67-8,449.58

Finding the Fourth Proportional to 20,139.50, 30,215.67 and 8,449.58

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Solution

The fourth proportional to 20,139.50, 30,215.67 and 8,449.58 is: 12,677.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.50 : 30,215.67 = 8,449.58 : x
  2. Step 2: Convert to fraction form
    20,139.50/30,215.67 = 8,449.58/x
  3. Step 3: Cross multiply
    20,139.50x = 30,215.67 × 8,449.58
  4. Step 4: Simplify right side
    20,139.50x = 255,309,720.92
  5. Step 5: Solve for x
    x = 255,309,720.92/20,139.50
  6. Step 6: Final answer
    x = 12,677.06

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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.