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Finding the Fourth Proportional to 15,847.88, 21,869.58 and 8,677.48

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Solution

The fourth proportional to 15,847.88, 21,869.58 and 8,677.48 is: 11,974.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.88 : 21,869.58 = 8,677.48 : x
  2. Step 2: Convert to fraction form
    15,847.88/21,869.58 = 8,677.48/x
  3. Step 3: Cross multiply
    15,847.88x = 21,869.58 × 8,677.48
  4. Step 4: Simplify right side
    15,847.88x = 189,772,843.06
  5. Step 5: Solve for x
    x = 189,772,843.06/15,847.88
  6. Step 6: Final answer
    x = 11,974.65

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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.