Home / 20,898.80-31,348.32-5,316.48

Finding the Fourth Proportional to 20,898.80, 31,348.32 and 5,316.48

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Solution

The fourth proportional to 20,898.80, 31,348.32 and 5,316.48 is: 7,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.80 : 31,348.32 = 5,316.48 : x
  2. Step 2: Convert to fraction form
    20,898.80/31,348.32 = 5,316.48/x
  3. Step 3: Cross multiply
    20,898.80x = 31,348.32 × 5,316.48
  4. Step 4: Simplify right side
    20,898.80x = 166,662,716.31
  5. Step 5: Solve for x
    x = 166,662,716.31/20,898.80
  6. Step 6: Final answer
    x = 7,974.75

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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.