Home / 9,279.75-13,921.79-3,123.75

Finding the Fourth Proportional to 9,279.75, 13,921.79 and 3,123.75

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Solution

The fourth proportional to 9,279.75, 13,921.79 and 3,123.75 is: 4,686.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.75 : 13,921.79 = 3,123.75 : x
  2. Step 2: Convert to fraction form
    9,279.75/13,921.79 = 3,123.75/x
  3. Step 3: Cross multiply
    9,279.75x = 13,921.79 × 3,123.75
  4. Step 4: Simplify right side
    9,279.75x = 43,488,175.89
  5. Step 5: Solve for x
    x = 43,488,175.89/9,279.75
  6. Step 6: Final answer
    x = 4,686.35

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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.