Home / 21,218.89-29,283.11-11,787.25

Finding the Fourth Proportional to 21,218.89, 29,283.11 and 11,787.25

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Solution

The fourth proportional to 21,218.89, 29,283.11 and 11,787.25 is: 16,266.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.89 : 29,283.11 = 11,787.25 : x
  2. Step 2: Convert to fraction form
    21,218.89/29,283.11 = 11,787.25/x
  3. Step 3: Cross multiply
    21,218.89x = 29,283.11 × 11,787.25
  4. Step 4: Simplify right side
    21,218.89x = 345,167,338.35
  5. Step 5: Solve for x
    x = 345,167,338.35/21,218.89
  6. Step 6: Final answer
    x = 16,266.98

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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.