Home / 21,255.78-31,884.81-6,463.59

Finding the Fourth Proportional to 21,255.78, 31,884.81 and 6,463.59

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Solution

The fourth proportional to 21,255.78, 31,884.81 and 6,463.59 is: 9,695.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.78 : 31,884.81 = 6,463.59 : x
  2. Step 2: Convert to fraction form
    21,255.78/31,884.81 = 6,463.59/x
  3. Step 3: Cross multiply
    21,255.78x = 31,884.81 × 6,463.59
  4. Step 4: Simplify right side
    21,255.78x = 206,090,339.07
  5. Step 5: Solve for x
    x = 206,090,339.07/21,255.78
  6. Step 6: Final answer
    x = 9,695.73

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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.