Home / 21,388.81-29,517.18-11,828.98

Finding the Fourth Proportional to 21,388.81, 29,517.18 and 11,828.98

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Solution

The fourth proportional to 21,388.81, 29,517.18 and 11,828.98 is: 16,324.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.81 : 29,517.18 = 11,828.98 : x
  2. Step 2: Convert to fraction form
    21,388.81/29,517.18 = 11,828.98/x
  3. Step 3: Cross multiply
    21,388.81x = 29,517.18 × 11,828.98
  4. Step 4: Simplify right side
    21,388.81x = 349,158,072.73
  5. Step 5: Solve for x
    x = 349,158,072.73/21,388.81
  6. Step 6: Final answer
    x = 16,324.34

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1.5x scale

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.