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Finding the Fourth Proportional to 12,761.75, 17,606.55 and 7,724.14

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Solution

The fourth proportional to 12,761.75, 17,606.55 and 7,724.14 is: 10,656.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,761.75 : 17,606.55 = 7,724.14 : x
  2. Step 2: Convert to fraction form
    12,761.75/17,606.55 = 7,724.14/x
  3. Step 3: Cross multiply
    12,761.75x = 17,606.55 × 7,724.14
  4. Step 4: Simplify right side
    12,761.75x = 135,995,457.12
  5. Step 5: Solve for x
    x = 135,995,457.12/12,761.75
  6. Step 6: Final answer
    x = 10,656.49

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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.