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Finding the Fourth Proportional to 12,346.76, 18,520.15 and 4,138.76

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Solution

The fourth proportional to 12,346.76, 18,520.15 and 4,138.76 is: 6,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,346.76 : 18,520.15 = 4,138.76 : x
  2. Step 2: Convert to fraction form
    12,346.76/18,520.15 = 4,138.76/x
  3. Step 3: Cross multiply
    12,346.76x = 18,520.15 × 4,138.76
  4. Step 4: Simplify right side
    12,346.76x = 76,650,456.01
  5. Step 5: Solve for x
    x = 76,650,456.01/12,346.76
  6. Step 6: Final answer
    x = 6,208.14

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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.