Home / 15,275.82-21,081.21-8,561.57

Finding the Fourth Proportional to 15,275.82, 21,081.21 and 8,561.57

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Solution

The fourth proportional to 15,275.82, 21,081.21 and 8,561.57 is: 11,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,275.82 : 21,081.21 = 8,561.57 : x
  2. Step 2: Convert to fraction form
    15,275.82/21,081.21 = 8,561.57/x
  3. Step 3: Cross multiply
    15,275.82x = 21,081.21 × 8,561.57
  4. Step 4: Simplify right side
    15,275.82x = 180,488,343.62
  5. Step 5: Solve for x
    x = 180,488,343.62/15,275.82
  6. Step 6: Final answer
    x = 11,815.30

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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.