Home / 3,903.76-5,385.68-2,487.19

Finding the Fourth Proportional to 3,903.76, 5,385.68 and 2,487.19

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Solution

The fourth proportional to 3,903.76, 5,385.68 and 2,487.19 is: 3,431.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.76 : 5,385.68 = 2,487.19 : x
  2. Step 2: Convert to fraction form
    3,903.76/5,385.68 = 2,487.19/x
  3. Step 3: Cross multiply
    3,903.76x = 5,385.68 × 2,487.19
  4. Step 4: Simplify right side
    3,903.76x = 13,395,217.20
  5. Step 5: Solve for x
    x = 13,395,217.20/3,903.76
  6. Step 6: Final answer
    x = 3,431.36

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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.