Home / 13,442.56-18,551.52-8,138.72

Finding the Fourth Proportional to 13,442.56, 18,551.52 and 8,138.72

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Solution

The fourth proportional to 13,442.56, 18,551.52 and 8,138.72 is: 11,231.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,442.56 : 18,551.52 = 8,138.72 : x
  2. Step 2: Convert to fraction form
    13,442.56/18,551.52 = 8,138.72/x
  3. Step 3: Cross multiply
    13,442.56x = 18,551.52 × 8,138.72
  4. Step 4: Simplify right side
    13,442.56x = 150,985,626.85
  5. Step 5: Solve for x
    x = 150,985,626.85/13,442.56
  6. Step 6: Final answer
    x = 11,231.91

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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.