Home / 7,217.64-10,815.12-5,578.20

Finding the Fourth Proportional to 7,217.64, 10,815.12 and 5,578.20

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Solution

The fourth proportional to 7,217.64, 10,815.12 and 5,578.20 is: 8,358.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,217.64 : 10,815.12 = 5,578.20 : x
  2. Step 2: Convert to fraction form
    7,217.64/10,815.12 = 5,578.20/x
  3. Step 3: Cross multiply
    7,217.64x = 10,815.12 × 5,578.20
  4. Step 4: Simplify right side
    7,217.64x = 60,328,902.38
  5. Step 5: Solve for x
    x = 60,328,902.38/7,217.64
  6. Step 6: Final answer
    x = 8,358.54

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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.