Home / 21,129.48-31,699.49-6,338.68

Finding the Fourth Proportional to 21,129.48, 31,699.49 and 6,338.68

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Solution

The fourth proportional to 21,129.48, 31,699.49 and 6,338.68 is: 9,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.48 : 31,699.49 = 6,338.68 : x
  2. Step 2: Convert to fraction form
    21,129.48/31,699.49 = 6,338.68/x
  3. Step 3: Cross multiply
    21,129.48x = 31,699.49 × 6,338.68
  4. Step 4: Simplify right side
    21,129.48x = 200,932,812.33
  5. Step 5: Solve for x
    x = 200,932,812.33/21,129.48
  6. Step 6: Final answer
    x = 9,509.60

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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.