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Finding the Fourth Proportional to 13,410.95, 18,499.41 and 8,366.40

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Solution

The fourth proportional to 13,410.95, 18,499.41 and 8,366.40 is: 11,540.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,410.95 : 18,499.41 = 8,366.40 : x
  2. Step 2: Convert to fraction form
    13,410.95/18,499.41 = 8,366.40/x
  3. Step 3: Cross multiply
    13,410.95x = 18,499.41 × 8,366.40
  4. Step 4: Simplify right side
    13,410.95x = 154,773,463.82
  5. Step 5: Solve for x
    x = 154,773,463.82/13,410.95
  6. Step 6: Final answer
    x = 11,540.83

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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.