Home / 30,338.82-45,531.52-20,828.81

Finding the Fourth Proportional to 30,338.82, 45,531.52 and 20,828.81

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Solution

The fourth proportional to 30,338.82, 45,531.52 and 20,828.81 is: 31,259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,338.82 : 45,531.52 = 20,828.81 : x
  2. Step 2: Convert to fraction form
    30,338.82/45,531.52 = 20,828.81/x
  3. Step 3: Cross multiply
    30,338.82x = 45,531.52 × 20,828.81
  4. Step 4: Simplify right side
    30,338.82x = 948,367,440.85
  5. Step 5: Solve for x
    x = 948,367,440.85/30,338.82
  6. Step 6: Final answer
    x = 31,259.21

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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.