Home / 21,048.87-31,556.54-12,154.11

Finding the Fourth Proportional to 21,048.87, 31,556.54 and 12,154.11

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Solution

The fourth proportional to 21,048.87, 31,556.54 and 12,154.11 is: 18,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.87 : 31,556.54 = 12,154.11 : x
  2. Step 2: Convert to fraction form
    21,048.87/31,556.54 = 12,154.11/x
  3. Step 3: Cross multiply
    21,048.87x = 31,556.54 × 12,154.11
  4. Step 4: Simplify right side
    21,048.87x = 383,541,658.38
  5. Step 5: Solve for x
    x = 383,541,658.38/21,048.87
  6. Step 6: Final answer
    x = 18,221.48

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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.