Home / 21,274.65-31,911.96-5,691.87

Finding the Fourth Proportional to 21,274.65, 31,911.96 and 5,691.87

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Solution

The fourth proportional to 21,274.65, 31,911.96 and 5,691.87 is: 8,537.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.65 : 31,911.96 = 5,691.87 : x
  2. Step 2: Convert to fraction form
    21,274.65/31,911.96 = 5,691.87/x
  3. Step 3: Cross multiply
    21,274.65x = 31,911.96 × 5,691.87
  4. Step 4: Simplify right side
    21,274.65x = 181,638,727.77
  5. Step 5: Solve for x
    x = 181,638,727.77/21,274.65
  6. Step 6: Final answer
    x = 8,537.80

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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.