Home / 21,081.15-31,618.07-7,230.15

Finding the Fourth Proportional to 21,081.15, 31,618.07 and 7,230.15

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Solution

The fourth proportional to 21,081.15, 31,618.07 and 7,230.15 is: 10,843.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.15 : 31,618.07 = 7,230.15 : x
  2. Step 2: Convert to fraction form
    21,081.15/31,618.07 = 7,230.15/x
  3. Step 3: Cross multiply
    21,081.15x = 31,618.07 × 7,230.15
  4. Step 4: Simplify right side
    21,081.15x = 228,603,388.81
  5. Step 5: Solve for x
    x = 228,603,388.81/21,081.15
  6. Step 6: Final answer
    x = 10,843.97

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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.