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Finding the Fourth Proportional to 17,172.40, 25,729.80 and 8,388.40

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Solution

The fourth proportional to 17,172.40, 25,729.80 and 8,388.40 is: 12,568.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,172.40 : 25,729.80 = 8,388.40 : x
  2. Step 2: Convert to fraction form
    17,172.40/25,729.80 = 8,388.40/x
  3. Step 3: Cross multiply
    17,172.40x = 25,729.80 × 8,388.40
  4. Step 4: Simplify right side
    17,172.40x = 215,831,854.32
  5. Step 5: Solve for x
    x = 215,831,854.32/17,172.40
  6. Step 6: Final answer
    x = 12,568.53

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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.