Home / 39,620.75-54,676.11-21,715.29

Finding the Fourth Proportional to 39,620.75, 54,676.11 and 21,715.29

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Solution

The fourth proportional to 39,620.75, 54,676.11 and 21,715.29 is: 29,966.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,620.75 : 54,676.11 = 21,715.29 : x
  2. Step 2: Convert to fraction form
    39,620.75/54,676.11 = 21,715.29/x
  3. Step 3: Cross multiply
    39,620.75x = 54,676.11 × 21,715.29
  4. Step 4: Simplify right side
    39,620.75x = 1,187,307,666.15
  5. Step 5: Solve for x
    x = 1,187,307,666.15/39,620.75
  6. Step 6: Final answer
    x = 29,966.82

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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.