Home / 21,081.13-31,618.50-7,930.44

Finding the Fourth Proportional to 21,081.13, 31,618.50 and 7,930.44

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Solution

The fourth proportional to 21,081.13, 31,618.50 and 7,930.44 is: 11,894.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.13 : 31,618.50 = 7,930.44 : x
  2. Step 2: Convert to fraction form
    21,081.13/31,618.50 = 7,930.44/x
  3. Step 3: Cross multiply
    21,081.13x = 31,618.50 × 7,930.44
  4. Step 4: Simplify right side
    21,081.13x = 250,748,617.14
  5. Step 5: Solve for x
    x = 250,748,617.14/21,081.13
  6. Step 6: Final answer
    x = 11,894.46

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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.