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Finding the Fourth Proportional to 13,411.80, 20,132.10 and 7,579.80

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Solution

The fourth proportional to 13,411.80, 20,132.10 and 7,579.80 is: 11,377.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.80 : 20,132.10 = 7,579.80 : x
  2. Step 2: Convert to fraction form
    13,411.80/20,132.10 = 7,579.80/x
  3. Step 3: Cross multiply
    13,411.80x = 20,132.10 × 7,579.80
  4. Step 4: Simplify right side
    13,411.80x = 152,597,291.58
  5. Step 5: Solve for x
    x = 152,597,291.58/13,411.80
  6. Step 6: Final answer
    x = 11,377.84

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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.