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Finding the Fourth Proportional to 12,151.20, 18,205.20 and 11,373.60

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Solution

The fourth proportional to 12,151.20, 18,205.20 and 11,373.60 is: 17,040.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,151.20 : 18,205.20 = 11,373.60 : x
  2. Step 2: Convert to fraction form
    12,151.20/18,205.20 = 11,373.60/x
  3. Step 3: Cross multiply
    12,151.20x = 18,205.20 × 11,373.60
  4. Step 4: Simplify right side
    12,151.20x = 207,058,662.72
  5. Step 5: Solve for x
    x = 207,058,662.72/12,151.20
  6. Step 6: Final answer
    x = 17,040.18

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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.