Home / 20,841.17-28,759.78-11,888.35

Finding the Fourth Proportional to 20,841.17, 28,759.78 and 11,888.35

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Solution

The fourth proportional to 20,841.17, 28,759.78 and 11,888.35 is: 16,405.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.17 : 28,759.78 = 11,888.35 : x
  2. Step 2: Convert to fraction form
    20,841.17/28,759.78 = 11,888.35/x
  3. Step 3: Cross multiply
    20,841.17x = 28,759.78 × 11,888.35
  4. Step 4: Simplify right side
    20,841.17x = 341,906,330.56
  5. Step 5: Solve for x
    x = 341,906,330.56/20,841.17
  6. Step 6: Final answer
    x = 16,405.33

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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.