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Finding the Fourth Proportional to 10,081.80, 15,125.74 and 5,404.05

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Solution

The fourth proportional to 10,081.80, 15,125.74 and 5,404.05 is: 8,107.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,081.80 : 15,125.74 = 5,404.05 : x
  2. Step 2: Convert to fraction form
    10,081.80/15,125.74 = 5,404.05/x
  3. Step 3: Cross multiply
    10,081.80x = 15,125.74 × 5,404.05
  4. Step 4: Simplify right side
    10,081.80x = 81,740,241.74
  5. Step 5: Solve for x
    x = 81,740,241.74/10,081.80
  6. Step 6: Final answer
    x = 8,107.70

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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.