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Finding the Fourth Proportional to 15,874.13, 21,905.31 and 8,800.55

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Solution

The fourth proportional to 15,874.13, 21,905.31 and 8,800.55 is: 12,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.13 : 21,905.31 = 8,800.55 : x
  2. Step 2: Convert to fraction form
    15,874.13/21,905.31 = 8,800.55/x
  3. Step 3: Cross multiply
    15,874.13x = 21,905.31 × 8,800.55
  4. Step 4: Simplify right side
    15,874.13x = 192,778,756.79
  5. Step 5: Solve for x
    x = 192,778,756.79/15,874.13
  6. Step 6: Final answer
    x = 12,144.21

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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.