Home / 7,122.78-10,686.32-5,046.80

Finding the Fourth Proportional to 7,122.78, 10,686.32 and 5,046.80

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Solution

The fourth proportional to 7,122.78, 10,686.32 and 5,046.80 is: 7,571.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.78 : 10,686.32 = 5,046.80 : x
  2. Step 2: Convert to fraction form
    7,122.78/10,686.32 = 5,046.80/x
  3. Step 3: Cross multiply
    7,122.78x = 10,686.32 × 5,046.80
  4. Step 4: Simplify right side
    7,122.78x = 53,931,719.78
  5. Step 5: Solve for x
    x = 53,931,719.78/7,122.78
  6. Step 6: Final answer
    x = 7,571.72

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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.