Home / 10,520.63-15,781.79-3,500.39

Finding the Fourth Proportional to 10,520.63, 15,781.79 and 3,500.39

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Solution

The fourth proportional to 10,520.63, 15,781.79 and 3,500.39 is: 5,250.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.63 : 15,781.79 = 3,500.39 : x
  2. Step 2: Convert to fraction form
    10,520.63/15,781.79 = 3,500.39/x
  3. Step 3: Cross multiply
    10,520.63x = 15,781.79 × 3,500.39
  4. Step 4: Simplify right side
    10,520.63x = 55,242,419.90
  5. Step 5: Solve for x
    x = 55,242,419.90/10,520.63
  6. Step 6: Final answer
    x = 5,250.87

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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.