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Finding the Fourth Proportional to 21,878.72, 32,823.32 and 7,087.66

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Solution

The fourth proportional to 21,878.72, 32,823.32 and 7,087.66 is: 10,633.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.72 : 32,823.32 = 7,087.66 : x
  2. Step 2: Convert to fraction form
    21,878.72/32,823.32 = 7,087.66/x
  3. Step 3: Cross multiply
    21,878.72x = 32,823.32 × 7,087.66
  4. Step 4: Simplify right side
    21,878.72x = 232,640,414.73
  5. Step 5: Solve for x
    x = 232,640,414.73/21,878.72
  6. Step 6: Final answer
    x = 10,633.18

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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.