Home / 20,550.21-28,357.65-12,591.34

Finding the Fourth Proportional to 20,550.21, 28,357.65 and 12,591.34

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Solution

The fourth proportional to 20,550.21, 28,357.65 and 12,591.34 is: 17,375.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.21 : 28,357.65 = 12,591.34 : x
  2. Step 2: Convert to fraction form
    20,550.21/28,357.65 = 12,591.34/x
  3. Step 3: Cross multiply
    20,550.21x = 28,357.65 × 12,591.34
  4. Step 4: Simplify right side
    20,550.21x = 357,060,812.75
  5. Step 5: Solve for x
    x = 357,060,812.75/20,550.21
  6. Step 6: Final answer
    x = 17,375.04

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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.