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Finding the Fourth Proportional to 7,129.68, 10,696.92 and 2,199.12

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Solution

The fourth proportional to 7,129.68, 10,696.92 and 2,199.12 is: 3,299.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.68 : 10,696.92 = 2,199.12 : x
  2. Step 2: Convert to fraction form
    7,129.68/10,696.92 = 2,199.12/x
  3. Step 3: Cross multiply
    7,129.68x = 10,696.92 × 2,199.12
  4. Step 4: Simplify right side
    7,129.68x = 23,523,810.71
  5. Step 5: Solve for x
    x = 23,523,810.71/7,129.68
  6. Step 6: Final answer
    x = 3,299.42

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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.