Home / 11,838.40-16,326.96-7,121.80

Finding the Fourth Proportional to 11,838.40, 16,326.96 and 7,121.80

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Solution

The fourth proportional to 11,838.40, 16,326.96 and 7,121.80 is: 9,822.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,838.40 : 16,326.96 = 7,121.80 : x
  2. Step 2: Convert to fraction form
    11,838.40/16,326.96 = 7,121.80/x
  3. Step 3: Cross multiply
    11,838.40x = 16,326.96 × 7,121.80
  4. Step 4: Simplify right side
    11,838.40x = 116,277,343.73
  5. Step 5: Solve for x
    x = 116,277,343.73/11,838.40
  6. Step 6: Final answer
    x = 9,822.05

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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.