Home / 20,442.35-28,210.68-12,375.89

Finding the Fourth Proportional to 20,442.35, 28,210.68 and 12,375.89

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Solution

The fourth proportional to 20,442.35, 28,210.68 and 12,375.89 is: 17,078.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.35 : 28,210.68 = 12,375.89 : x
  2. Step 2: Convert to fraction form
    20,442.35/28,210.68 = 12,375.89/x
  3. Step 3: Cross multiply
    20,442.35x = 28,210.68 × 12,375.89
  4. Step 4: Simplify right side
    20,442.35x = 349,132,131.45
  5. Step 5: Solve for x
    x = 349,132,131.45/20,442.35
  6. Step 6: Final answer
    x = 17,078.87

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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.