Home / 20,779.13-31,147.90-7,448.49

Finding the Fourth Proportional to 20,779.13, 31,147.90 and 7,448.49

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Solution

The fourth proportional to 20,779.13, 31,147.90 and 7,448.49 is: 11,165.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.13 : 31,147.90 = 7,448.49 : x
  2. Step 2: Convert to fraction form
    20,779.13/31,147.90 = 7,448.49/x
  3. Step 3: Cross multiply
    20,779.13x = 31,147.90 × 7,448.49
  4. Step 4: Simplify right side
    20,779.13x = 232,004,899.54
  5. Step 5: Solve for x
    x = 232,004,899.54/20,779.13
  6. Step 6: Final answer
    x = 11,165.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.