Home / 21,252.11-31,872.69-8,775.68

Finding the Fourth Proportional to 21,252.11, 31,872.69 and 8,775.68

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Solution

The fourth proportional to 21,252.11, 31,872.69 and 8,775.68 is: 13,161.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,252.11 : 31,872.69 = 8,775.68 : x
  2. Step 2: Convert to fraction form
    21,252.11/31,872.69 = 8,775.68/x
  3. Step 3: Cross multiply
    21,252.11x = 31,872.69 × 8,775.68
  4. Step 4: Simplify right side
    21,252.11x = 279,704,368.82
  5. Step 5: Solve for x
    x = 279,704,368.82/21,252.11
  6. Step 6: Final answer
    x = 13,161.25

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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.