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Finding the Fourth Proportional to 15,818.75, 21,827.98 and 8,744.21

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Solution

The fourth proportional to 15,818.75, 21,827.98 and 8,744.21 is: 12,065.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.75 : 21,827.98 = 8,744.21 : x
  2. Step 2: Convert to fraction form
    15,818.75/21,827.98 = 8,744.21/x
  3. Step 3: Cross multiply
    15,818.75x = 21,827.98 × 8,744.21
  4. Step 4: Simplify right side
    15,818.75x = 190,868,441.00
  5. Step 5: Solve for x
    x = 190,868,441.00/15,818.75
  6. Step 6: Final answer
    x = 12,065.96

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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.