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Finding the Fourth Proportional to 7,170.04, 9,880.14 and 5,174.20

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Solution

The fourth proportional to 7,170.04, 9,880.14 and 5,174.20 is: 7,129.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,170.04 : 9,880.14 = 5,174.20 : x
  2. Step 2: Convert to fraction form
    7,170.04/9,880.14 = 5,174.20/x
  3. Step 3: Cross multiply
    7,170.04x = 9,880.14 × 5,174.20
  4. Step 4: Simplify right side
    7,170.04x = 51,121,820.39
  5. Step 5: Solve for x
    x = 51,121,820.39/7,170.04
  6. Step 6: Final answer
    x = 7,129.92

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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.