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Finding the Fourth Proportional to 7,190.76, 9,921.77 and 4,206

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Solution

The fourth proportional to 7,190.76, 9,921.77 and 4,206 is: 5,803.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.76 : 9,921.77 = 4,206 : x
  2. Step 2: Convert to fraction form
    7,190.76/9,921.77 = 4,206/x
  3. Step 3: Cross multiply
    7,190.76x = 9,921.77 × 4,206
  4. Step 4: Simplify right side
    7,190.76x = 41,730,964.62
  5. Step 5: Solve for x
    x = 41,730,964.62/7,190.76
  6. Step 6: Final answer
    x = 5,803.42

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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.