Home / 13,449.12-20,156.16-6,869.76

Finding the Fourth Proportional to 13,449.12, 20,156.16 and 6,869.76

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Solution

The fourth proportional to 13,449.12, 20,156.16 and 6,869.76 is: 10,295.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449.12 : 20,156.16 = 6,869.76 : x
  2. Step 2: Convert to fraction form
    13,449.12/20,156.16 = 6,869.76/x
  3. Step 3: Cross multiply
    13,449.12x = 20,156.16 × 6,869.76
  4. Step 4: Simplify right side
    13,449.12x = 138,467,981.72
  5. Step 5: Solve for x
    x = 138,467,981.72/13,449.12
  6. Step 6: Final answer
    x = 10,295.69

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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.