Home / 20,800.13-31,200.19-6,949.13

Finding the Fourth Proportional to 20,800.13, 31,200.19 and 6,949.13

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Solution

The fourth proportional to 20,800.13, 31,200.19 and 6,949.13 is: 10,423.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.13 : 31,200.19 = 6,949.13 : x
  2. Step 2: Convert to fraction form
    20,800.13/31,200.19 = 6,949.13/x
  3. Step 3: Cross multiply
    20,800.13x = 31,200.19 × 6,949.13
  4. Step 4: Simplify right side
    20,800.13x = 216,814,002.96
  5. Step 5: Solve for x
    x = 216,814,002.96/20,800.13
  6. Step 6: Final answer
    x = 10,423.69

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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.