Home / 13,172.62-18,178.18-7,122.82

Finding the Fourth Proportional to 13,172.62, 18,178.18 and 7,122.82

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Solution

The fourth proportional to 13,172.62, 18,178.18 and 7,122.82 is: 9,829.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.62 : 18,178.18 = 7,122.82 : x
  2. Step 2: Convert to fraction form
    13,172.62/18,178.18 = 7,122.82/x
  3. Step 3: Cross multiply
    13,172.62x = 18,178.18 × 7,122.82
  4. Step 4: Simplify right side
    13,172.62x = 129,479,777.56
  5. Step 5: Solve for x
    x = 129,479,777.56/13,172.62
  6. Step 6: Final answer
    x = 9,829.46

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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.