Home / 20,432.85-28,195.61-11,479.65

Finding the Fourth Proportional to 20,432.85, 28,195.61 and 11,479.65

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Solution

The fourth proportional to 20,432.85, 28,195.61 and 11,479.65 is: 15,840.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.85 : 28,195.61 = 11,479.65 : x
  2. Step 2: Convert to fraction form
    20,432.85/28,195.61 = 11,479.65/x
  3. Step 3: Cross multiply
    20,432.85x = 28,195.61 × 11,479.65
  4. Step 4: Simplify right side
    20,432.85x = 323,675,676.94
  5. Step 5: Solve for x
    x = 323,675,676.94/20,432.85
  6. Step 6: Final answer
    x = 15,840.95

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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.