Home / 7,021.38-9,689.57-3,877.77

Finding the Fourth Proportional to 7,021.38, 9,689.57 and 3,877.77

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Solution

The fourth proportional to 7,021.38, 9,689.57 and 3,877.77 is: 5,351.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.38 : 9,689.57 = 3,877.77 : x
  2. Step 2: Convert to fraction form
    7,021.38/9,689.57 = 3,877.77/x
  3. Step 3: Cross multiply
    7,021.38x = 9,689.57 × 3,877.77
  4. Step 4: Simplify right side
    7,021.38x = 37,573,923.86
  5. Step 5: Solve for x
    x = 37,573,923.86/7,021.38
  6. Step 6: Final answer
    x = 5,351.36

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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.