Home / 20,844.24-28,770.44-12,780.59

Finding the Fourth Proportional to 20,844.24, 28,770.44 and 12,780.59

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Solution

The fourth proportional to 20,844.24, 28,770.44 and 12,780.59 is: 17,640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,844.24 : 28,770.44 = 12,780.59 : x
  2. Step 2: Convert to fraction form
    20,844.24/28,770.44 = 12,780.59/x
  3. Step 3: Cross multiply
    20,844.24x = 28,770.44 × 12,780.59
  4. Step 4: Simplify right side
    20,844.24x = 367,703,061.90
  5. Step 5: Solve for x
    x = 367,703,061.90/20,844.24
  6. Step 6: Final answer
    x = 17,640.51

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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.