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Finding the Fourth Proportional to 15,843.87, 21,863.75 and 8,770.14

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Solution

The fourth proportional to 15,843.87, 21,863.75 and 8,770.14 is: 12,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.87 : 21,863.75 = 8,770.14 : x
  2. Step 2: Convert to fraction form
    15,843.87/21,863.75 = 8,770.14/x
  3. Step 3: Cross multiply
    15,843.87x = 21,863.75 × 8,770.14
  4. Step 4: Simplify right side
    15,843.87x = 191,748,104.57
  5. Step 5: Solve for x
    x = 191,748,104.57/15,843.87
  6. Step 6: Final answer
    x = 12,102.35

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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.