Home / 12,744.40-19,116.60-3,980.20

Finding the Fourth Proportional to 12,744.40, 19,116.60 and 3,980.20

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Solution

The fourth proportional to 12,744.40, 19,116.60 and 3,980.20 is: 5,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,744.40 : 19,116.60 = 3,980.20 : x
  2. Step 2: Convert to fraction form
    12,744.40/19,116.60 = 3,980.20/x
  3. Step 3: Cross multiply
    12,744.40x = 19,116.60 × 3,980.20
  4. Step 4: Simplify right side
    12,744.40x = 76,087,891.32
  5. Step 5: Solve for x
    x = 76,087,891.32/12,744.40
  6. Step 6: Final answer
    x = 5,970.30

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Similar ratio
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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.