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Finding the Fourth Proportional to 13,275.91, 18,310.53 and 8,243.11

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Solution

The fourth proportional to 13,275.91, 18,310.53 and 8,243.11 is: 11,369.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,275.91 : 18,310.53 = 8,243.11 : x
  2. Step 2: Convert to fraction form
    13,275.91/18,310.53 = 8,243.11/x
  3. Step 3: Cross multiply
    13,275.91x = 18,310.53 × 8,243.11
  4. Step 4: Simplify right side
    13,275.91x = 150,935,712.95
  5. Step 5: Solve for x
    x = 150,935,712.95/13,275.91
  6. Step 6: Final answer
    x = 11,369.14

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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.