Home / 20,691.26-31,039.81-6,646.58

Finding the Fourth Proportional to 20,691.26, 31,039.81 and 6,646.58

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Solution

The fourth proportional to 20,691.26, 31,039.81 and 6,646.58 is: 9,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.26 : 31,039.81 = 6,646.58 : x
  2. Step 2: Convert to fraction form
    20,691.26/31,039.81 = 6,646.58/x
  3. Step 3: Cross multiply
    20,691.26x = 31,039.81 × 6,646.58
  4. Step 4: Simplify right side
    20,691.26x = 206,308,486.13
  5. Step 5: Solve for x
    x = 206,308,486.13/20,691.26
  6. Step 6: Final answer
    x = 9,970.80

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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.