Home / 7,142.19-9,856.38-4,158.55

Finding the Fourth Proportional to 7,142.19, 9,856.38 and 4,158.55

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Solution

The fourth proportional to 7,142.19, 9,856.38 and 4,158.55 is: 5,738.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.19 : 9,856.38 = 4,158.55 : x
  2. Step 2: Convert to fraction form
    7,142.19/9,856.38 = 4,158.55/x
  3. Step 3: Cross multiply
    7,142.19x = 9,856.38 × 4,158.55
  4. Step 4: Simplify right side
    7,142.19x = 40,988,249.05
  5. Step 5: Solve for x
    x = 40,988,249.05/7,142.19
  6. Step 6: Final answer
    x = 5,738.89

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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.