Home / 21,431.05-32,125.31-10,869.66

Finding the Fourth Proportional to 21,431.05, 32,125.31 and 10,869.66

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Solution

The fourth proportional to 21,431.05, 32,125.31 and 10,869.66 is: 16,293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.05 : 32,125.31 = 10,869.66 : x
  2. Step 2: Convert to fraction form
    21,431.05/32,125.31 = 10,869.66/x
  3. Step 3: Cross multiply
    21,431.05x = 32,125.31 × 10,869.66
  4. Step 4: Simplify right side
    21,431.05x = 349,191,197.09
  5. Step 5: Solve for x
    x = 349,191,197.09/21,431.05
  6. Step 6: Final answer
    x = 16,293.70

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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.