Home / 7,021.36-9,689.28-3,877.48

Finding the Fourth Proportional to 7,021.36, 9,689.28 and 3,877.48

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Solution

The fourth proportional to 7,021.36, 9,689.28 and 3,877.48 is: 5,350.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.36 : 9,689.28 = 3,877.48 : x
  2. Step 2: Convert to fraction form
    7,021.36/9,689.28 = 3,877.48/x
  3. Step 3: Cross multiply
    7,021.36x = 9,689.28 × 3,877.48
  4. Step 4: Simplify right side
    7,021.36x = 37,569,989.41
  5. Step 5: Solve for x
    x = 37,569,989.41/7,021.36
  6. Step 6: Final answer
    x = 5,350.81

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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.