Home / 5,187.35-7,781.03-1,291.75

Finding the Fourth Proportional to 5,187.35, 7,781.03 and 1,291.75

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Solution

The fourth proportional to 5,187.35, 7,781.03 and 1,291.75 is: 1,937.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.35 : 7,781.03 = 1,291.75 : x
  2. Step 2: Convert to fraction form
    5,187.35/7,781.03 = 1,291.75/x
  3. Step 3: Cross multiply
    5,187.35x = 7,781.03 × 1,291.75
  4. Step 4: Simplify right side
    5,187.35x = 10,051,100.14
  5. Step 5: Solve for x
    x = 10,051,100.14/5,187.35
  6. Step 6: Final answer
    x = 1,937.62

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1.5x scale

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.