Home / 15,449.39-21,320.07-8,375.79

Finding the Fourth Proportional to 15,449.39, 21,320.07 and 8,375.79

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Solution

The fourth proportional to 15,449.39, 21,320.07 and 8,375.79 is: 11,558.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.39 : 21,320.07 = 8,375.79 : x
  2. Step 2: Convert to fraction form
    15,449.39/21,320.07 = 8,375.79/x
  3. Step 3: Cross multiply
    15,449.39x = 21,320.07 × 8,375.79
  4. Step 4: Simplify right side
    15,449.39x = 178,572,429.11
  5. Step 5: Solve for x
    x = 178,572,429.11/15,449.39
  6. Step 6: Final answer
    x = 11,558.55

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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.