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Finding the Fourth Proportional to 13,670.92, 20,499.08 and 7,080.76

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Solution

The fourth proportional to 13,670.92, 20,499.08 and 7,080.76 is: 10,617.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.92 : 20,499.08 = 7,080.76 : x
  2. Step 2: Convert to fraction form
    13,670.92/20,499.08 = 7,080.76/x
  3. Step 3: Cross multiply
    13,670.92x = 20,499.08 × 7,080.76
  4. Step 4: Simplify right side
    13,670.92x = 145,149,065.70
  5. Step 5: Solve for x
    x = 145,149,065.70/13,670.92
  6. Step 6: Final answer
    x = 10,617.36

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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.