Home / 7,021.66-9,689.76-3,877.78

Finding the Fourth Proportional to 7,021.66, 9,689.76 and 3,877.78

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Solution

The fourth proportional to 7,021.66, 9,689.76 and 3,877.78 is: 5,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.66 : 9,689.76 = 3,877.78 : x
  2. Step 2: Convert to fraction form
    7,021.66/9,689.76 = 3,877.78/x
  3. Step 3: Cross multiply
    7,021.66x = 9,689.76 × 3,877.78
  4. Step 4: Simplify right side
    7,021.66x = 37,574,757.53
  5. Step 5: Solve for x
    x = 37,574,757.53/7,021.66
  6. Step 6: Final answer
    x = 5,351.26

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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.