Home / 7,415.60-11,129.70-3,036.20

Finding the Fourth Proportional to 7,415.60, 11,129.70 and 3,036.20

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Solution

The fourth proportional to 7,415.60, 11,129.70 and 3,036.20 is: 4,556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.60 : 11,129.70 = 3,036.20 : x
  2. Step 2: Convert to fraction form
    7,415.60/11,129.70 = 3,036.20/x
  3. Step 3: Cross multiply
    7,415.60x = 11,129.70 × 3,036.20
  4. Step 4: Simplify right side
    7,415.60x = 33,791,995.14
  5. Step 5: Solve for x
    x = 33,791,995.14/7,415.60
  6. Step 6: Final answer
    x = 4,556.88

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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.