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Finding the Fourth Proportional to 9,161.64, 12,643.10 and 4,969.92

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Solution

The fourth proportional to 9,161.64, 12,643.10 and 4,969.92 is: 6,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,161.64 : 12,643.10 = 4,969.92 : x
  2. Step 2: Convert to fraction form
    9,161.64/12,643.10 = 4,969.92/x
  3. Step 3: Cross multiply
    9,161.64x = 12,643.10 × 4,969.92
  4. Step 4: Simplify right side
    9,161.64x = 62,835,195.55
  5. Step 5: Solve for x
    x = 62,835,195.55/9,161.64
  6. Step 6: Final answer
    x = 6,858.51

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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.