Home / 19,517.60-29,276.40-7,839.20

Finding the Fourth Proportional to 19,517.60, 29,276.40 and 7,839.20

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Solution

The fourth proportional to 19,517.60, 29,276.40 and 7,839.20 is: 11,758.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,517.60 : 29,276.40 = 7,839.20 : x
  2. Step 2: Convert to fraction form
    19,517.60/29,276.40 = 7,839.20/x
  3. Step 3: Cross multiply
    19,517.60x = 29,276.40 × 7,839.20
  4. Step 4: Simplify right side
    19,517.60x = 229,503,554.88
  5. Step 5: Solve for x
    x = 229,503,554.88/19,517.60
  6. Step 6: Final answer
    x = 11,758.80

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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.