Home / 21,164.10-29,193.24-13,620.30

Finding the Fourth Proportional to 21,164.10, 29,193.24 and 13,620.30

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Solution

The fourth proportional to 21,164.10, 29,193.24 and 13,620.30 is: 18,787.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,164.10 : 29,193.24 = 13,620.30 : x
  2. Step 2: Convert to fraction form
    21,164.10/29,193.24 = 13,620.30/x
  3. Step 3: Cross multiply
    21,164.10x = 29,193.24 × 13,620.30
  4. Step 4: Simplify right side
    21,164.10x = 397,620,686.77
  5. Step 5: Solve for x
    x = 397,620,686.77/21,164.10
  6. Step 6: Final answer
    x = 18,787.51

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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.