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Finding the Fourth Proportional to 7,478.65, 11,217.99 and 2,799.16

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Solution

The fourth proportional to 7,478.65, 11,217.99 and 2,799.16 is: 4,198.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.65 : 11,217.99 = 2,799.16 : x
  2. Step 2: Convert to fraction form
    7,478.65/11,217.99 = 2,799.16/x
  3. Step 3: Cross multiply
    7,478.65x = 11,217.99 × 2,799.16
  4. Step 4: Simplify right side
    7,478.65x = 31,400,931.34
  5. Step 5: Solve for x
    x = 31,400,931.34/7,478.65
  6. Step 6: Final answer
    x = 4,198.74

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Similar ratio
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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.