Home / 13,361.76-20,036.72-7,120.61

Finding the Fourth Proportional to 13,361.76, 20,036.72 and 7,120.61

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Solution

The fourth proportional to 13,361.76, 20,036.72 and 7,120.61 is: 10,677.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.76 : 20,036.72 = 7,120.61 : x
  2. Step 2: Convert to fraction form
    13,361.76/20,036.72 = 7,120.61/x
  3. Step 3: Cross multiply
    13,361.76x = 20,036.72 × 7,120.61
  4. Step 4: Simplify right side
    13,361.76x = 142,673,621.50
  5. Step 5: Solve for x
    x = 142,673,621.50/13,361.76
  6. Step 6: Final answer
    x = 10,677.76

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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.