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Finding the Fourth Proportional to 13,151.44, 18,148.44 and 7,487.02

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Solution

The fourth proportional to 13,151.44, 18,148.44 and 7,487.02 is: 10,331.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.44 : 18,148.44 = 7,487.02 : x
  2. Step 2: Convert to fraction form
    13,151.44/18,148.44 = 7,487.02/x
  3. Step 3: Cross multiply
    13,151.44x = 18,148.44 × 7,487.02
  4. Step 4: Simplify right side
    13,151.44x = 135,877,733.25
  5. Step 5: Solve for x
    x = 135,877,733.25/13,151.44
  6. Step 6: Final answer
    x = 10,331.78

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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.