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Finding the Fourth Proportional to 9,900.73, 13,661.71 and 5,920.39

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Solution

The fourth proportional to 9,900.73, 13,661.71 and 5,920.39 is: 8,169.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,900.73 : 13,661.71 = 5,920.39 : x
  2. Step 2: Convert to fraction form
    9,900.73/13,661.71 = 5,920.39/x
  3. Step 3: Cross multiply
    9,900.73x = 13,661.71 × 5,920.39
  4. Step 4: Simplify right side
    9,900.73x = 80,882,686.85
  5. Step 5: Solve for x
    x = 80,882,686.85/9,900.73
  6. Step 6: Final answer
    x = 8,169.36

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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.