Home / 7,015.20-9,680.95-3,871.38

Finding the Fourth Proportional to 7,015.20, 9,680.95 and 3,871.38

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Solution

The fourth proportional to 7,015.20, 9,680.95 and 3,871.38 is: 5,342.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,015.20 : 9,680.95 = 3,871.38 : x
  2. Step 2: Convert to fraction form
    7,015.20/9,680.95 = 3,871.38/x
  3. Step 3: Cross multiply
    7,015.20x = 9,680.95 × 3,871.38
  4. Step 4: Simplify right side
    7,015.20x = 37,478,636.21
  5. Step 5: Solve for x
    x = 37,478,636.21/7,015.20
  6. Step 6: Final answer
    x = 5,342.49

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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.