Home / 21,278.79-31,919.31-5,483.97

Finding the Fourth Proportional to 21,278.79, 31,919.31 and 5,483.97

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Solution

The fourth proportional to 21,278.79, 31,919.31 and 5,483.97 is: 8,226.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.79 : 31,919.31 = 5,483.97 : x
  2. Step 2: Convert to fraction form
    21,278.79/31,919.31 = 5,483.97/x
  3. Step 3: Cross multiply
    21,278.79x = 31,919.31 × 5,483.97
  4. Step 4: Simplify right side
    21,278.79x = 175,044,538.46
  5. Step 5: Solve for x
    x = 175,044,538.46/21,278.79
  6. Step 6: Final answer
    x = 8,226.24

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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.