Home / 21,381.30-29,506.20-11,690.79

Finding the Fourth Proportional to 21,381.30, 29,506.20 and 11,690.79

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Solution

The fourth proportional to 21,381.30, 29,506.20 and 11,690.79 is: 16,133.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.30 : 29,506.20 = 11,690.79 : x
  2. Step 2: Convert to fraction form
    21,381.30/29,506.20 = 11,690.79/x
  3. Step 3: Cross multiply
    21,381.30x = 29,506.20 × 11,690.79
  4. Step 4: Simplify right side
    21,381.30x = 344,950,787.90
  5. Step 5: Solve for x
    x = 344,950,787.90/21,381.30
  6. Step 6: Final answer
    x = 16,133.29

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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.