Home / 21,586.11-29,789.43-12,155.01

Finding the Fourth Proportional to 21,586.11, 29,789.43 and 12,155.01

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Solution

The fourth proportional to 21,586.11, 29,789.43 and 12,155.01 is: 16,774.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,586.11 : 29,789.43 = 12,155.01 : x
  2. Step 2: Convert to fraction form
    21,586.11/29,789.43 = 12,155.01/x
  3. Step 3: Cross multiply
    21,586.11x = 29,789.43 × 12,155.01
  4. Step 4: Simplify right side
    21,586.11x = 362,090,819.54
  5. Step 5: Solve for x
    x = 362,090,819.54/21,586.11
  6. Step 6: Final answer
    x = 16,774.25

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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.