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Finding the Fourth Proportional to 15,448.68, 21,319.20 and 8,375.10

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Solution

The fourth proportional to 15,448.68, 21,319.20 and 8,375.10 is: 11,557.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,448.68 : 21,319.20 = 8,375.10 : x
  2. Step 2: Convert to fraction form
    15,448.68/21,319.20 = 8,375.10/x
  3. Step 3: Cross multiply
    15,448.68x = 21,319.20 × 8,375.10
  4. Step 4: Simplify right side
    15,448.68x = 178,550,431.92
  5. Step 5: Solve for x
    x = 178,550,431.92/15,448.68
  6. Step 6: Final answer
    x = 11,557.65

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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.