Home / 10,280.32-15,420.34-2,489.20

Finding the Fourth Proportional to 10,280.32, 15,420.34 and 2,489.20

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Solution

The fourth proportional to 10,280.32, 15,420.34 and 2,489.20 is: 3,733.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,280.32 : 15,420.34 = 2,489.20 : x
  2. Step 2: Convert to fraction form
    10,280.32/15,420.34 = 2,489.20/x
  3. Step 3: Cross multiply
    10,280.32x = 15,420.34 × 2,489.20
  4. Step 4: Simplify right side
    10,280.32x = 38,384,274.89
  5. Step 5: Solve for x
    x = 38,384,274.89/10,280.32
  6. Step 6: Final answer
    x = 3,733.76

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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.