Home / 5,781.12-7,981.85-3,795.05

Finding the Fourth Proportional to 5,781.12, 7,981.85 and 3,795.05

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Solution

The fourth proportional to 5,781.12, 7,981.85 and 3,795.05 is: 5,239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.12 : 7,981.85 = 3,795.05 : x
  2. Step 2: Convert to fraction form
    5,781.12/7,981.85 = 3,795.05/x
  3. Step 3: Cross multiply
    5,781.12x = 7,981.85 × 3,795.05
  4. Step 4: Simplify right side
    5,781.12x = 30,291,460.96
  5. Step 5: Solve for x
    x = 30,291,460.96/5,781.12
  6. Step 6: Final answer
    x = 5,239.72

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1.5x scale

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.