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Finding the Fourth Proportional to 16,774.40, 25,132.80 and 7,990.40

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Solution

The fourth proportional to 16,774.40, 25,132.80 and 7,990.40 is: 11,971.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,774.40 : 25,132.80 = 7,990.40 : x
  2. Step 2: Convert to fraction form
    16,774.40/25,132.80 = 7,990.40/x
  3. Step 3: Cross multiply
    16,774.40x = 25,132.80 × 7,990.40
  4. Step 4: Simplify right side
    16,774.40x = 200,821,125.12
  5. Step 5: Solve for x
    x = 200,821,125.12/16,774.40
  6. Step 6: Final answer
    x = 11,971.88

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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.