Home / 5,716.67-7,878.31-4,120.55

Finding the Fourth Proportional to 5,716.67, 7,878.31 and 4,120.55

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Solution

The fourth proportional to 5,716.67, 7,878.31 and 4,120.55 is: 5,678.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,716.67 : 7,878.31 = 4,120.55 : x
  2. Step 2: Convert to fraction form
    5,716.67/7,878.31 = 4,120.55/x
  3. Step 3: Cross multiply
    5,716.67x = 7,878.31 × 4,120.55
  4. Step 4: Simplify right side
    5,716.67x = 32,463,017.61
  5. Step 5: Solve for x
    x = 32,463,017.61/5,716.67
  6. Step 6: Final answer
    x = 5,678.66

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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.