Home / 15,521.25-21,419.33-8,447.72

Finding the Fourth Proportional to 15,521.25, 21,419.33 and 8,447.72

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Solution

The fourth proportional to 15,521.25, 21,419.33 and 8,447.72 is: 11,657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.25 : 21,419.33 = 8,447.72 : x
  2. Step 2: Convert to fraction form
    15,521.25/21,419.33 = 8,447.72/x
  3. Step 3: Cross multiply
    15,521.25x = 21,419.33 × 8,447.72
  4. Step 4: Simplify right side
    15,521.25x = 180,944,513.74
  5. Step 5: Solve for x
    x = 180,944,513.74/15,521.25
  6. Step 6: Final answer
    x = 11,657.86

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Double scale
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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.