Home / 7,140.72-9,855.22-4,158.20

Finding the Fourth Proportional to 7,140.72, 9,855.22 and 4,158.20

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Solution

The fourth proportional to 7,140.72, 9,855.22 and 4,158.20 is: 5,738.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.72 : 9,855.22 = 4,158.20 : x
  2. Step 2: Convert to fraction form
    7,140.72/9,855.22 = 4,158.20/x
  3. Step 3: Cross multiply
    7,140.72x = 9,855.22 × 4,158.20
  4. Step 4: Simplify right side
    7,140.72x = 40,979,975.80
  5. Step 5: Solve for x
    x = 40,979,975.80/7,140.72
  6. Step 6: Final answer
    x = 5,738.91

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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.