Home / 9,639.19-13,309.32-8,521.39

Finding the Fourth Proportional to 9,639.19, 13,309.32 and 8,521.39

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Solution

The fourth proportional to 9,639.19, 13,309.32 and 8,521.39 is: 11,765.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.19 : 13,309.32 = 8,521.39 : x
  2. Step 2: Convert to fraction form
    9,639.19/13,309.32 = 8,521.39/x
  3. Step 3: Cross multiply
    9,639.19x = 13,309.32 × 8,521.39
  4. Step 4: Simplify right side
    9,639.19x = 113,413,906.35
  5. Step 5: Solve for x
    x = 113,413,906.35/9,639.19
  6. Step 6: Final answer
    x = 11,765.92

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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.