Home / 10,087.44-13,920.42-5,611.20

Finding the Fourth Proportional to 10,087.44, 13,920.42 and 5,611.20

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Solution

The fourth proportional to 10,087.44, 13,920.42 and 5,611.20 is: 7,743.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,087.44 : 13,920.42 = 5,611.20 : x
  2. Step 2: Convert to fraction form
    10,087.44/13,920.42 = 5,611.20/x
  3. Step 3: Cross multiply
    10,087.44x = 13,920.42 × 5,611.20
  4. Step 4: Simplify right side
    10,087.44x = 78,110,260.70
  5. Step 5: Solve for x
    x = 78,110,260.70/10,087.44
  6. Step 6: Final answer
    x = 7,743.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.