Home / 20,385.76-28,106.04-13,672.48

Finding the Fourth Proportional to 20,385.76, 28,106.04 and 13,672.48

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Solution

The fourth proportional to 20,385.76, 28,106.04 and 13,672.48 is: 18,850.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.76 : 28,106.04 = 13,672.48 : x
  2. Step 2: Convert to fraction form
    20,385.76/28,106.04 = 13,672.48/x
  3. Step 3: Cross multiply
    20,385.76x = 28,106.04 × 13,672.48
  4. Step 4: Simplify right side
    20,385.76x = 384,279,269.78
  5. Step 5: Solve for x
    x = 384,279,269.78/20,385.76
  6. Step 6: Final answer
    x = 18,850.38

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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.