Home / 21,490.50-29,655.99-11,929.67

Finding the Fourth Proportional to 21,490.50, 29,655.99 and 11,929.67

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Solution

The fourth proportional to 21,490.50, 29,655.99 and 11,929.67 is: 16,462.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.50 : 29,655.99 = 11,929.67 : x
  2. Step 2: Convert to fraction form
    21,490.50/29,655.99 = 11,929.67/x
  3. Step 3: Cross multiply
    21,490.50x = 29,655.99 × 11,929.67
  4. Step 4: Simplify right side
    21,490.50x = 353,786,174.22
  5. Step 5: Solve for x
    x = 353,786,174.22/21,490.50
  6. Step 6: Final answer
    x = 16,462.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.