Home / 12,751.38-17,580.78-9,121.77

Finding the Fourth Proportional to 12,751.38, 17,580.78 and 9,121.77

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Solution

The fourth proportional to 12,751.38, 17,580.78 and 9,121.77 is: 12,576.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.38 : 17,580.78 = 9,121.77 : x
  2. Step 2: Convert to fraction form
    12,751.38/17,580.78 = 9,121.77/x
  3. Step 3: Cross multiply
    12,751.38x = 17,580.78 × 9,121.77
  4. Step 4: Simplify right side
    12,751.38x = 160,367,831.58
  5. Step 5: Solve for x
    x = 160,367,831.58/12,751.38
  6. Step 6: Final answer
    x = 12,576.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.