Home / 21,321.20-29,424.15-11,889.75

Finding the Fourth Proportional to 21,321.20, 29,424.15 and 11,889.75

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Solution

The fourth proportional to 21,321.20, 29,424.15 and 11,889.75 is: 16,408.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.20 : 29,424.15 = 11,889.75 : x
  2. Step 2: Convert to fraction form
    21,321.20/29,424.15 = 11,889.75/x
  3. Step 3: Cross multiply
    21,321.20x = 29,424.15 × 11,889.75
  4. Step 4: Simplify right side
    21,321.20x = 349,845,787.46
  5. Step 5: Solve for x
    x = 349,845,787.46/21,321.20
  6. Step 6: Final answer
    x = 16,408.36

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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.