Home / 5,260.42-7,890.60-2,139.82

Finding the Fourth Proportional to 5,260.42, 7,890.60 and 2,139.82

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Solution

The fourth proportional to 5,260.42, 7,890.60 and 2,139.82 is: 3,209.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,260.42 : 7,890.60 = 2,139.82 : x
  2. Step 2: Convert to fraction form
    5,260.42/7,890.60 = 2,139.82/x
  3. Step 3: Cross multiply
    5,260.42x = 7,890.60 × 2,139.82
  4. Step 4: Simplify right side
    5,260.42x = 16,884,463.69
  5. Step 5: Solve for x
    x = 16,884,463.69/5,260.42
  6. Step 6: Final answer
    x = 3,209.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.