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Finding the Fourth Proportional to 13,101.10, 18,079.64 and 7,132.80

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Solution

The fourth proportional to 13,101.10, 18,079.64 and 7,132.80 is: 9,843.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.10 : 18,079.64 = 7,132.80 : x
  2. Step 2: Convert to fraction form
    13,101.10/18,079.64 = 7,132.80/x
  3. Step 3: Cross multiply
    13,101.10x = 18,079.64 × 7,132.80
  4. Step 4: Simplify right side
    13,101.10x = 128,958,456.19
  5. Step 5: Solve for x
    x = 128,958,456.19/13,101.10
  6. Step 6: Final answer
    x = 9,843.33

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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.