Home / 8,678.40-13,022.78-7,972.57

Finding the Fourth Proportional to 8,678.40, 13,022.78 and 7,972.57

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Solution

The fourth proportional to 8,678.40, 13,022.78 and 7,972.57 is: 11,963.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.40 : 13,022.78 = 7,972.57 : x
  2. Step 2: Convert to fraction form
    8,678.40/13,022.78 = 7,972.57/x
  3. Step 3: Cross multiply
    8,678.40x = 13,022.78 × 7,972.57
  4. Step 4: Simplify right side
    8,678.40x = 103,825,025.14
  5. Step 5: Solve for x
    x = 103,825,025.14/8,678.40
  6. Step 6: Final answer
    x = 11,963.61

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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.