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Finding the Fourth Proportional to 7,679.49, 10,603.80 and 5,163.81

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Solution

The fourth proportional to 7,679.49, 10,603.80 and 5,163.81 is: 7,130.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.49 : 10,603.80 = 5,163.81 : x
  2. Step 2: Convert to fraction form
    7,679.49/10,603.80 = 5,163.81/x
  3. Step 3: Cross multiply
    7,679.49x = 10,603.80 × 5,163.81
  4. Step 4: Simplify right side
    7,679.49x = 54,756,008.48
  5. Step 5: Solve for x
    x = 54,756,008.48/7,679.49
  6. Step 6: Final answer
    x = 7,130.16

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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.