Home / 20,490.64-30,732.60-7,340.56

Finding the Fourth Proportional to 20,490.64, 30,732.60 and 7,340.56

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Solution

The fourth proportional to 20,490.64, 30,732.60 and 7,340.56 is: 11,009.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.64 : 30,732.60 = 7,340.56 : x
  2. Step 2: Convert to fraction form
    20,490.64/30,732.60 = 7,340.56/x
  3. Step 3: Cross multiply
    20,490.64x = 30,732.60 × 7,340.56
  4. Step 4: Simplify right side
    20,490.64x = 225,594,494.26
  5. Step 5: Solve for x
    x = 225,594,494.26/20,490.64
  6. Step 6: Final answer
    x = 11,009.64

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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.