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Finding the Fourth Proportional to 12,643.13, 17,447.39 and 6,977.95

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Solution

The fourth proportional to 12,643.13, 17,447.39 and 6,977.95 is: 9,629.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.13 : 17,447.39 = 6,977.95 : x
  2. Step 2: Convert to fraction form
    12,643.13/17,447.39 = 6,977.95/x
  3. Step 3: Cross multiply
    12,643.13x = 17,447.39 × 6,977.95
  4. Step 4: Simplify right side
    12,643.13x = 121,747,015.05
  5. Step 5: Solve for x
    x = 121,747,015.05/12,643.13
  6. Step 6: Final answer
    x = 9,629.50

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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.