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Finding the Fourth Proportional to 13,423.80, 20,151.90 and 13,326.60

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Solution

The fourth proportional to 13,423.80, 20,151.90 and 13,326.60 is: 20,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.80 : 20,151.90 = 13,326.60 : x
  2. Step 2: Convert to fraction form
    13,423.80/20,151.90 = 13,326.60/x
  3. Step 3: Cross multiply
    13,423.80x = 20,151.90 × 13,326.60
  4. Step 4: Simplify right side
    13,423.80x = 268,556,310.54
  5. Step 5: Solve for x
    x = 268,556,310.54/13,423.80
  6. Step 6: Final answer
    x = 20,005.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.