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Finding the Fourth Proportional to 15,172.41, 20,938.64 and 8,458.08

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Solution

The fourth proportional to 15,172.41, 20,938.64 and 8,458.08 is: 11,672.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.41 : 20,938.64 = 8,458.08 : x
  2. Step 2: Convert to fraction form
    15,172.41/20,938.64 = 8,458.08/x
  3. Step 3: Cross multiply
    15,172.41x = 20,938.64 × 8,458.08
  4. Step 4: Simplify right side
    15,172.41x = 177,100,649.92
  5. Step 5: Solve for x
    x = 177,100,649.92/15,172.41
  6. Step 6: Final answer
    x = 11,672.55

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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.