Home / 21,081.12-31,616.81-7,934.82

Finding the Fourth Proportional to 21,081.12, 31,616.81 and 7,934.82

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Solution

The fourth proportional to 21,081.12, 31,616.81 and 7,934.82 is: 11,900.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.12 : 31,616.81 = 7,934.82 : x
  2. Step 2: Convert to fraction form
    21,081.12/31,616.81 = 7,934.82/x
  3. Step 3: Cross multiply
    21,081.12x = 31,616.81 × 7,934.82
  4. Step 4: Simplify right side
    21,081.12x = 250,873,696.32
  5. Step 5: Solve for x
    x = 250,873,696.32/21,081.12
  6. Step 6: Final answer
    x = 11,900.40

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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.