Home / 21,129.99-31,684.05-11,266.62

Finding the Fourth Proportional to 21,129.99, 31,684.05 and 11,266.62

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Solution

The fourth proportional to 21,129.99, 31,684.05 and 11,266.62 is: 16,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.99 : 31,684.05 = 11,266.62 : x
  2. Step 2: Convert to fraction form
    21,129.99/31,684.05 = 11,266.62/x
  3. Step 3: Cross multiply
    21,129.99x = 31,684.05 × 11,266.62
  4. Step 4: Simplify right side
    21,129.99x = 356,972,151.41
  5. Step 5: Solve for x
    x = 356,972,151.41/21,129.99
  6. Step 6: Final answer
    x = 16,894.10

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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.