Home / 20,739.20-28,611.93-12,767.57

Finding the Fourth Proportional to 20,739.20, 28,611.93 and 12,767.57

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Solution

The fourth proportional to 20,739.20, 28,611.93 and 12,767.57 is: 17,614.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.20 : 28,611.93 = 12,767.57 : x
  2. Step 2: Convert to fraction form
    20,739.20/28,611.93 = 12,767.57/x
  3. Step 3: Cross multiply
    20,739.20x = 28,611.93 × 12,767.57
  4. Step 4: Simplify right side
    20,739.20x = 365,304,819.11
  5. Step 5: Solve for x
    x = 365,304,819.11/20,739.20
  6. Step 6: Final answer
    x = 17,614.22

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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.