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Finding the Fourth Proportional to 15,842.90, 21,863.32 and 8,769.18

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Solution

The fourth proportional to 15,842.90, 21,863.32 and 8,769.18 is: 12,101.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.90 : 21,863.32 = 8,769.18 : x
  2. Step 2: Convert to fraction form
    15,842.90/21,863.32 = 8,769.18/x
  3. Step 3: Cross multiply
    15,842.90x = 21,863.32 × 8,769.18
  4. Step 4: Simplify right side
    15,842.90x = 191,723,388.48
  5. Step 5: Solve for x
    x = 191,723,388.48/15,842.90
  6. Step 6: Final answer
    x = 12,101.53

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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.