Home / 8,897.57-12,279.56-5,120.87

Finding the Fourth Proportional to 8,897.57, 12,279.56 and 5,120.87

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Solution

The fourth proportional to 8,897.57, 12,279.56 and 5,120.87 is: 7,067.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.57 : 12,279.56 = 5,120.87 : x
  2. Step 2: Convert to fraction form
    8,897.57/12,279.56 = 5,120.87/x
  3. Step 3: Cross multiply
    8,897.57x = 12,279.56 × 5,120.87
  4. Step 4: Simplify right side
    8,897.57x = 62,882,035.51
  5. Step 5: Solve for x
    x = 62,882,035.51/8,897.57
  6. Step 6: Final answer
    x = 7,067.33

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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.