Home / 7,140.81-9,854.10-4,115.94

Finding the Fourth Proportional to 7,140.81, 9,854.10 and 4,115.94

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Solution

The fourth proportional to 7,140.81, 9,854.10 and 4,115.94 is: 5,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.81 : 9,854.10 = 4,115.94 : x
  2. Step 2: Convert to fraction form
    7,140.81/9,854.10 = 4,115.94/x
  3. Step 3: Cross multiply
    7,140.81x = 9,854.10 × 4,115.94
  4. Step 4: Simplify right side
    7,140.81x = 40,558,884.35
  5. Step 5: Solve for x
    x = 40,558,884.35/7,140.81
  6. Step 6: Final answer
    x = 5,679.87

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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.