Home / 21,418.56-29,557.44-18,429.12

Finding the Fourth Proportional to 21,418.56, 29,557.44 and 18,429.12

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Solution

The fourth proportional to 21,418.56, 29,557.44 and 18,429.12 is: 25,432.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.56 : 29,557.44 = 18,429.12 : x
  2. Step 2: Convert to fraction form
    21,418.56/29,557.44 = 18,429.12/x
  3. Step 3: Cross multiply
    21,418.56x = 29,557.44 × 18,429.12
  4. Step 4: Simplify right side
    21,418.56x = 544,717,608.65
  5. Step 5: Solve for x
    x = 544,717,608.65/21,418.56
  6. Step 6: Final answer
    x = 25,432.04

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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.