Home / 5,185.74-7,781.36-3,109.92

Finding the Fourth Proportional to 5,185.74, 7,781.36 and 3,109.92

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Solution

The fourth proportional to 5,185.74, 7,781.36 and 3,109.92 is: 4,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.74 : 7,781.36 = 3,109.92 : x
  2. Step 2: Convert to fraction form
    5,185.74/7,781.36 = 3,109.92/x
  3. Step 3: Cross multiply
    5,185.74x = 7,781.36 × 3,109.92
  4. Step 4: Simplify right side
    5,185.74x = 24,199,362.36
  5. Step 5: Solve for x
    x = 24,199,362.36/5,185.74
  6. Step 6: Final answer
    x = 4,666.52

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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.