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Finding the Fourth Proportional to 13,223.68, 18,250.11 and 8,447.99

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Solution

The fourth proportional to 13,223.68, 18,250.11 and 8,447.99 is: 11,659.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,223.68 : 18,250.11 = 8,447.99 : x
  2. Step 2: Convert to fraction form
    13,223.68/18,250.11 = 8,447.99/x
  3. Step 3: Cross multiply
    13,223.68x = 18,250.11 × 8,447.99
  4. Step 4: Simplify right side
    13,223.68x = 154,176,655.53
  5. Step 5: Solve for x
    x = 154,176,655.53/13,223.68
  6. Step 6: Final answer
    x = 11,659.14

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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.