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Finding the Fourth Proportional to 13,876.65, 20,809.77 and 10,920.87

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Solution

The fourth proportional to 13,876.65, 20,809.77 and 10,920.87 is: 16,377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,876.65 : 20,809.77 = 10,920.87 : x
  2. Step 2: Convert to fraction form
    13,876.65/20,809.77 = 10,920.87/x
  3. Step 3: Cross multiply
    13,876.65x = 20,809.77 × 10,920.87
  4. Step 4: Simplify right side
    13,876.65x = 227,260,792.90
  5. Step 5: Solve for x
    x = 227,260,792.90/13,876.65
  6. Step 6: Final answer
    x = 16,377.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.