Home / 7,121.16-10,688.63-3,425.94

Finding the Fourth Proportional to 7,121.16, 10,688.63 and 3,425.94

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Solution

The fourth proportional to 7,121.16, 10,688.63 and 3,425.94 is: 5,142.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.16 : 10,688.63 = 3,425.94 : x
  2. Step 2: Convert to fraction form
    7,121.16/10,688.63 = 3,425.94/x
  3. Step 3: Cross multiply
    7,121.16x = 10,688.63 × 3,425.94
  4. Step 4: Simplify right side
    7,121.16x = 36,618,587.93
  5. Step 5: Solve for x
    x = 36,618,587.93/7,121.16
  6. Step 6: Final answer
    x = 5,142.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.