Home / 18,136.12-27,212.54-8,278.42

Finding the Fourth Proportional to 18,136.12, 27,212.54 and 8,278.42

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Solution

The fourth proportional to 18,136.12, 27,212.54 and 8,278.42 is: 12,421.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,136.12 : 27,212.54 = 8,278.42 : x
  2. Step 2: Convert to fraction form
    18,136.12/27,212.54 = 8,278.42/x
  3. Step 3: Cross multiply
    18,136.12x = 27,212.54 × 8,278.42
  4. Step 4: Simplify right side
    18,136.12x = 225,276,835.39
  5. Step 5: Solve for x
    x = 225,276,835.39/18,136.12
  6. Step 6: Final answer
    x = 12,421.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.