Home / 7,021.42-9,689.34-3,877.36

Finding the Fourth Proportional to 7,021.42, 9,689.34 and 3,877.36

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Solution

The fourth proportional to 7,021.42, 9,689.34 and 3,877.36 is: 5,350.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.42 : 9,689.34 = 3,877.36 : x
  2. Step 2: Convert to fraction form
    7,021.42/9,689.34 = 3,877.36/x
  3. Step 3: Cross multiply
    7,021.42x = 9,689.34 × 3,877.36
  4. Step 4: Simplify right side
    7,021.42x = 37,569,059.34
  5. Step 5: Solve for x
    x = 37,569,059.34/7,021.42
  6. Step 6: Final answer
    x = 5,350.64

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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.