Home / 20,580.72-28,399.70-11,629

Finding the Fourth Proportional to 20,580.72, 28,399.70 and 11,629

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Solution

The fourth proportional to 20,580.72, 28,399.70 and 11,629 is: 16,047.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.72 : 28,399.70 = 11,629 : x
  2. Step 2: Convert to fraction form
    20,580.72/28,399.70 = 11,629/x
  3. Step 3: Cross multiply
    20,580.72x = 28,399.70 × 11,629
  4. Step 4: Simplify right side
    20,580.72x = 330,260,111.30
  5. Step 5: Solve for x
    x = 330,260,111.30/20,580.72
  6. Step 6: Final answer
    x = 16,047.06

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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.