Home / 20,908.09-31,364.70-6,869.65

Finding the Fourth Proportional to 20,908.09, 31,364.70 and 6,869.65

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Solution

The fourth proportional to 20,908.09, 31,364.70 and 6,869.65 is: 10,305.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.09 : 31,364.70 = 6,869.65 : x
  2. Step 2: Convert to fraction form
    20,908.09/31,364.70 = 6,869.65/x
  3. Step 3: Cross multiply
    20,908.09x = 31,364.70 × 6,869.65
  4. Step 4: Simplify right side
    20,908.09x = 215,464,511.36
  5. Step 5: Solve for x
    x = 215,464,511.36/20,908.09
  6. Step 6: Final answer
    x = 10,305.32

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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.