Home / 13,820.30-20,711.10-7,481.48

Finding the Fourth Proportional to 13,820.30, 20,711.10 and 7,481.48

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Solution

The fourth proportional to 13,820.30, 20,711.10 and 7,481.48 is: 11,211.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.30 : 20,711.10 = 7,481.48 : x
  2. Step 2: Convert to fraction form
    13,820.30/20,711.10 = 7,481.48/x
  3. Step 3: Cross multiply
    13,820.30x = 20,711.10 × 7,481.48
  4. Step 4: Simplify right side
    13,820.30x = 154,949,680.43
  5. Step 5: Solve for x
    x = 154,949,680.43/13,820.30
  6. Step 6: Final answer
    x = 11,211.75

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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.