Home / 20,928.38-28,881.16-11,497.55

Finding the Fourth Proportional to 20,928.38, 28,881.16 and 11,497.55

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Solution

The fourth proportional to 20,928.38, 28,881.16 and 11,497.55 is: 15,866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.38 : 28,881.16 = 11,497.55 : x
  2. Step 2: Convert to fraction form
    20,928.38/28,881.16 = 11,497.55/x
  3. Step 3: Cross multiply
    20,928.38x = 28,881.16 × 11,497.55
  4. Step 4: Simplify right side
    20,928.38x = 332,062,408.01
  5. Step 5: Solve for x
    x = 332,062,408.01/20,928.38
  6. Step 6: Final answer
    x = 15,866.61

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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.