Home / 7,140.79-9,854.23-3,997.03

Finding the Fourth Proportional to 7,140.79, 9,854.23 and 3,997.03

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Solution

The fourth proportional to 7,140.79, 9,854.23 and 3,997.03 is: 5,515.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.79 : 9,854.23 = 3,997.03 : x
  2. Step 2: Convert to fraction form
    7,140.79/9,854.23 = 3,997.03/x
  3. Step 3: Cross multiply
    7,140.79x = 9,854.23 × 3,997.03
  4. Step 4: Simplify right side
    7,140.79x = 39,387,652.94
  5. Step 5: Solve for x
    x = 39,387,652.94/7,140.79
  6. Step 6: Final answer
    x = 5,515.87

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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.