Home / 12,121.13-16,727.36-7,929.38

Finding the Fourth Proportional to 12,121.13, 16,727.36 and 7,929.38

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Solution

The fourth proportional to 12,121.13, 16,727.36 and 7,929.38 is: 10,942.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.13 : 16,727.36 = 7,929.38 : x
  2. Step 2: Convert to fraction form
    12,121.13/16,727.36 = 7,929.38/x
  3. Step 3: Cross multiply
    12,121.13x = 16,727.36 × 7,929.38
  4. Step 4: Simplify right side
    12,121.13x = 132,637,470.55
  5. Step 5: Solve for x
    x = 132,637,470.55/12,121.13
  6. Step 6: Final answer
    x = 10,942.67

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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.