Home / 10,280.90-15,421.35-2,489.72

Finding the Fourth Proportional to 10,280.90, 15,421.35 and 2,489.72

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Solution

The fourth proportional to 10,280.90, 15,421.35 and 2,489.72 is: 3,734.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,280.90 : 15,421.35 = 2,489.72 : x
  2. Step 2: Convert to fraction form
    10,280.90/15,421.35 = 2,489.72/x
  3. Step 3: Cross multiply
    10,280.90x = 15,421.35 × 2,489.72
  4. Step 4: Simplify right side
    10,280.90x = 38,394,766.42
  5. Step 5: Solve for x
    x = 38,394,766.42/10,280.90
  6. Step 6: Final answer
    x = 3,734.57

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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.