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Finding the Fourth Proportional to 12,058.40, 18,082.20 and 5,481.20

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Solution

The fourth proportional to 12,058.40, 18,082.20 and 5,481.20 is: 8,219.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,058.40 : 18,082.20 = 5,481.20 : x
  2. Step 2: Convert to fraction form
    12,058.40/18,082.20 = 5,481.20/x
  3. Step 3: Cross multiply
    12,058.40x = 18,082.20 × 5,481.20
  4. Step 4: Simplify right side
    12,058.40x = 99,112,154.64
  5. Step 5: Solve for x
    x = 99,112,154.64/12,058.40
  6. Step 6: Final answer
    x = 8,219.35

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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.