Home / 7,140.80-9,854.64-3,997.04

Finding the Fourth Proportional to 7,140.80, 9,854.64 and 3,997.04

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Solution

The fourth proportional to 7,140.80, 9,854.64 and 3,997.04 is: 5,516.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.80 : 9,854.64 = 3,997.04 : x
  2. Step 2: Convert to fraction form
    7,140.80/9,854.64 = 3,997.04/x
  3. Step 3: Cross multiply
    7,140.80x = 9,854.64 × 3,997.04
  4. Step 4: Simplify right side
    7,140.80x = 39,389,390.27
  5. Step 5: Solve for x
    x = 39,389,390.27/7,140.80
  6. Step 6: Final answer
    x = 5,516.10

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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.