Home / 5,186.57-7,778.25-1,487.81

Finding the Fourth Proportional to 5,186.57, 7,778.25 and 1,487.81

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Solution

The fourth proportional to 5,186.57, 7,778.25 and 1,487.81 is: 2,231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.57 : 7,778.25 = 1,487.81 : x
  2. Step 2: Convert to fraction form
    5,186.57/7,778.25 = 1,487.81/x
  3. Step 3: Cross multiply
    5,186.57x = 7,778.25 × 1,487.81
  4. Step 4: Simplify right side
    5,186.57x = 11,572,558.13
  5. Step 5: Solve for x
    x = 11,572,558.13/5,186.57
  6. Step 6: Final answer
    x = 2,231.25

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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.