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Finding the Fourth Proportional to 15,844.90, 21,866.08 and 8,771.18

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Solution

The fourth proportional to 15,844.90, 21,866.08 and 8,771.18 is: 12,104.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,844.90 : 21,866.08 = 8,771.18 : x
  2. Step 2: Convert to fraction form
    15,844.90/21,866.08 = 8,771.18/x
  3. Step 3: Cross multiply
    15,844.90x = 21,866.08 × 8,771.18
  4. Step 4: Simplify right side
    15,844.90x = 191,791,323.57
  5. Step 5: Solve for x
    x = 191,791,323.57/15,844.90
  6. Step 6: Final answer
    x = 12,104.29

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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.