Home / 20,810.97-31,201.85-7,661.65

Finding the Fourth Proportional to 20,810.97, 31,201.85 and 7,661.65

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Solution

The fourth proportional to 20,810.97, 31,201.85 and 7,661.65 is: 11,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.97 : 31,201.85 = 7,661.65 : x
  2. Step 2: Convert to fraction form
    20,810.97/31,201.85 = 7,661.65/x
  3. Step 3: Cross multiply
    20,810.97x = 31,201.85 × 7,661.65
  4. Step 4: Simplify right side
    20,810.97x = 239,057,615.74
  5. Step 5: Solve for x
    x = 239,057,615.74/20,810.97
  6. Step 6: Final answer
    x = 11,487.10

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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.