Home / 7,021.08-9,689.20-3,877.28

Finding the Fourth Proportional to 7,021.08, 9,689.20 and 3,877.28

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Solution

The fourth proportional to 7,021.08, 9,689.20 and 3,877.28 is: 5,350.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.08 : 9,689.20 = 3,877.28 : x
  2. Step 2: Convert to fraction form
    7,021.08/9,689.20 = 3,877.28/x
  3. Step 3: Cross multiply
    7,021.08x = 9,689.20 × 3,877.28
  4. Step 4: Simplify right side
    7,021.08x = 37,567,741.38
  5. Step 5: Solve for x
    x = 37,567,741.38/7,021.08
  6. Step 6: Final answer
    x = 5,350.71

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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.