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Finding the Fourth Proportional to 7,176.04, 9,902.74 and 3,989.16

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Solution

The fourth proportional to 7,176.04, 9,902.74 and 3,989.16 is: 5,504.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,176.04 : 9,902.74 = 3,989.16 : x
  2. Step 2: Convert to fraction form
    7,176.04/9,902.74 = 3,989.16/x
  3. Step 3: Cross multiply
    7,176.04x = 9,902.74 × 3,989.16
  4. Step 4: Simplify right side
    7,176.04x = 39,503,614.30
  5. Step 5: Solve for x
    x = 39,503,614.30/7,176.04
  6. Step 6: Final answer
    x = 5,504.93

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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.