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Finding the Fourth Proportional to 6,868.74, 9,477.21 and 3,884.16

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Solution

The fourth proportional to 6,868.74, 9,477.21 and 3,884.16 is: 5,359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,868.74 : 9,477.21 = 3,884.16 : x
  2. Step 2: Convert to fraction form
    6,868.74/9,477.21 = 3,884.16/x
  3. Step 3: Cross multiply
    6,868.74x = 9,477.21 × 3,884.16
  4. Step 4: Simplify right side
    6,868.74x = 36,810,999.99
  5. Step 5: Solve for x
    x = 36,810,999.99/6,868.74
  6. Step 6: Final answer
    x = 5,359.21

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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.