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Finding the Fourth Proportional to 17,257.20, 25,885.80 and 12,008.40

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Solution

The fourth proportional to 17,257.20, 25,885.80 and 12,008.40 is: 18,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,257.20 : 25,885.80 = 12,008.40 : x
  2. Step 2: Convert to fraction form
    17,257.20/25,885.80 = 12,008.40/x
  3. Step 3: Cross multiply
    17,257.20x = 25,885.80 × 12,008.40
  4. Step 4: Simplify right side
    17,257.20x = 310,847,040.72
  5. Step 5: Solve for x
    x = 310,847,040.72/17,257.20
  6. Step 6: Final answer
    x = 18,012.60

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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.