Home / 20,754.40-28,641.12-11,801.68

Finding the Fourth Proportional to 20,754.40, 28,641.12 and 11,801.68

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Solution

The fourth proportional to 20,754.40, 28,641.12 and 11,801.68 is: 16,286.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.40 : 28,641.12 = 11,801.68 : x
  2. Step 2: Convert to fraction form
    20,754.40/28,641.12 = 11,801.68/x
  3. Step 3: Cross multiply
    20,754.40x = 28,641.12 × 11,801.68
  4. Step 4: Simplify right side
    20,754.40x = 338,013,333.08
  5. Step 5: Solve for x
    x = 338,013,333.08/20,754.40
  6. Step 6: Final answer
    x = 16,286.35

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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.