Home / 21,457.78-32,175.69-8,974.39

Finding the Fourth Proportional to 21,457.78, 32,175.69 and 8,974.39

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Solution

The fourth proportional to 21,457.78, 32,175.69 and 8,974.39 is: 13,456.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457.78 : 32,175.69 = 8,974.39 : x
  2. Step 2: Convert to fraction form
    21,457.78/32,175.69 = 8,974.39/x
  3. Step 3: Cross multiply
    21,457.78x = 32,175.69 × 8,974.39
  4. Step 4: Simplify right side
    21,457.78x = 288,757,190.58
  5. Step 5: Solve for x
    x = 288,757,190.58/21,457.78
  6. Step 6: Final answer
    x = 13,456.99

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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.