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Finding the Fourth Proportional to 12,643.44, 17,447.85 and 7,338.75

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Solution

The fourth proportional to 12,643.44, 17,447.85 and 7,338.75 is: 10,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.44 : 17,447.85 = 7,338.75 : x
  2. Step 2: Convert to fraction form
    12,643.44/17,447.85 = 7,338.75/x
  3. Step 3: Cross multiply
    12,643.44x = 17,447.85 × 7,338.75
  4. Step 4: Simplify right side
    12,643.44x = 128,045,409.19
  5. Step 5: Solve for x
    x = 128,045,409.19/12,643.44
  6. Step 6: Final answer
    x = 10,127.42

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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.