Home / 20,868.03-28,797.12-11,436.39

Finding the Fourth Proportional to 20,868.03, 28,797.12 and 11,436.39

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Solution

The fourth proportional to 20,868.03, 28,797.12 and 11,436.39 is: 15,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.03 : 28,797.12 = 11,436.39 : x
  2. Step 2: Convert to fraction form
    20,868.03/28,797.12 = 11,436.39/x
  3. Step 3: Cross multiply
    20,868.03x = 28,797.12 × 11,436.39
  4. Step 4: Simplify right side
    20,868.03x = 329,335,095.20
  5. Step 5: Solve for x
    x = 329,335,095.20/20,868.03
  6. Step 6: Final answer
    x = 15,781.80

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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.