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Finding the Fourth Proportional to 15,448.69, 21,319.22 and 8,375.12

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Solution

The fourth proportional to 15,448.69, 21,319.22 and 8,375.12 is: 11,557.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,448.69 : 21,319.22 = 8,375.12 : x
  2. Step 2: Convert to fraction form
    15,448.69/21,319.22 = 8,375.12/x
  3. Step 3: Cross multiply
    15,448.69x = 21,319.22 × 8,375.12
  4. Step 4: Simplify right side
    15,448.69x = 178,551,037.23
  5. Step 5: Solve for x
    x = 178,551,037.23/15,448.69
  6. Step 6: Final answer
    x = 11,557.68

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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.