Home / 21,723.08-29,982.53-13,228.01

Finding the Fourth Proportional to 21,723.08, 29,982.53 and 13,228.01

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Solution

The fourth proportional to 21,723.08, 29,982.53 and 13,228.01 is: 18,257.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.08 : 29,982.53 = 13,228.01 : x
  2. Step 2: Convert to fraction form
    21,723.08/29,982.53 = 13,228.01/x
  3. Step 3: Cross multiply
    21,723.08x = 29,982.53 × 13,228.01
  4. Step 4: Simplify right side
    21,723.08x = 396,609,123.20
  5. Step 5: Solve for x
    x = 396,609,123.20/21,723.08
  6. Step 6: Final answer
    x = 18,257.50

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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.