Home / 15,221.97-21,007.28-8,508.08

Finding the Fourth Proportional to 15,221.97, 21,007.28 and 8,508.08

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Solution

The fourth proportional to 15,221.97, 21,007.28 and 8,508.08 is: 11,741.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,221.97 : 21,007.28 = 8,508.08 : x
  2. Step 2: Convert to fraction form
    15,221.97/21,007.28 = 8,508.08/x
  3. Step 3: Cross multiply
    15,221.97x = 21,007.28 × 8,508.08
  4. Step 4: Simplify right side
    15,221.97x = 178,731,618.82
  5. Step 5: Solve for x
    x = 178,731,618.82/15,221.97
  6. Step 6: Final answer
    x = 11,741.69

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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.