Home / 10,281.09-15,421.64-2,489.90

Finding the Fourth Proportional to 10,281.09, 15,421.64 and 2,489.90

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Solution

The fourth proportional to 10,281.09, 15,421.64 and 2,489.90 is: 3,734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,281.09 : 15,421.64 = 2,489.90 : x
  2. Step 2: Convert to fraction form
    10,281.09/15,421.64 = 2,489.90/x
  3. Step 3: Cross multiply
    10,281.09x = 15,421.64 × 2,489.90
  4. Step 4: Simplify right side
    10,281.09x = 38,398,367.54
  5. Step 5: Solve for x
    x = 38,398,367.54/10,281.09
  6. Step 6: Final answer
    x = 3,734.85

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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.