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Finding the Fourth Proportional to 12,753.82, 17,601.70 and 7,720.81

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Solution

The fourth proportional to 12,753.82, 17,601.70 and 7,720.81 is: 10,655.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,753.82 : 17,601.70 = 7,720.81 : x
  2. Step 2: Convert to fraction form
    12,753.82/17,601.70 = 7,720.81/x
  3. Step 3: Cross multiply
    12,753.82x = 17,601.70 × 7,720.81
  4. Step 4: Simplify right side
    12,753.82x = 135,899,449.41
  5. Step 5: Solve for x
    x = 135,899,449.41/12,753.82
  6. Step 6: Final answer
    x = 10,655.59

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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.