Home / 21,869.10-32,813.28-11,478.42

Finding the Fourth Proportional to 21,869.10, 32,813.28 and 11,478.42

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Solution

The fourth proportional to 21,869.10, 32,813.28 and 11,478.42 is: 17,222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.10 : 32,813.28 = 11,478.42 : x
  2. Step 2: Convert to fraction form
    21,869.10/32,813.28 = 11,478.42/x
  3. Step 3: Cross multiply
    21,869.10x = 32,813.28 × 11,478.42
  4. Step 4: Simplify right side
    21,869.10x = 376,644,609.42
  5. Step 5: Solve for x
    x = 376,644,609.42/21,869.10
  6. Step 6: Final answer
    x = 17,222.68

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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.