Home / 21,281.83-31,921.52-8,135.53

Finding the Fourth Proportional to 21,281.83, 31,921.52 and 8,135.53

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Solution

The fourth proportional to 21,281.83, 31,921.52 and 8,135.53 is: 12,202.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.83 : 31,921.52 = 8,135.53 : x
  2. Step 2: Convert to fraction form
    21,281.83/31,921.52 = 8,135.53/x
  3. Step 3: Cross multiply
    21,281.83x = 31,921.52 × 8,135.53
  4. Step 4: Simplify right side
    21,281.83x = 259,698,424.14
  5. Step 5: Solve for x
    x = 259,698,424.14/21,281.83
  6. Step 6: Final answer
    x = 12,202.83

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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.