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Finding the Fourth Proportional to 12,338.05, 18,505.05 and 5,316.16

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Solution

The fourth proportional to 12,338.05, 18,505.05 and 5,316.16 is: 7,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,338.05 : 18,505.05 = 5,316.16 : x
  2. Step 2: Convert to fraction form
    12,338.05/18,505.05 = 5,316.16/x
  3. Step 3: Cross multiply
    12,338.05x = 18,505.05 × 5,316.16
  4. Step 4: Simplify right side
    12,338.05x = 98,375,806.61
  5. Step 5: Solve for x
    x = 98,375,806.61/12,338.05
  6. Step 6: Final answer
    x = 7,973.37

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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.