Home / 20,800.68-28,705.50-12,422.04

Finding the Fourth Proportional to 20,800.68, 28,705.50 and 12,422.04

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Solution

The fourth proportional to 20,800.68, 28,705.50 and 12,422.04 is: 17,142.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.68 : 28,705.50 = 12,422.04 : x
  2. Step 2: Convert to fraction form
    20,800.68/28,705.50 = 12,422.04/x
  3. Step 3: Cross multiply
    20,800.68x = 28,705.50 × 12,422.04
  4. Step 4: Simplify right side
    20,800.68x = 356,580,869.22
  5. Step 5: Solve for x
    x = 356,580,869.22/20,800.68
  6. Step 6: Final answer
    x = 17,142.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.