Home / 20,877.09-31,314.21-9,786.25

Finding the Fourth Proportional to 20,877.09, 31,314.21 and 9,786.25

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Solution

The fourth proportional to 20,877.09, 31,314.21 and 9,786.25 is: 14,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.09 : 31,314.21 = 9,786.25 : x
  2. Step 2: Convert to fraction form
    20,877.09/31,314.21 = 9,786.25/x
  3. Step 3: Cross multiply
    20,877.09x = 31,314.21 × 9,786.25
  4. Step 4: Simplify right side
    20,877.09x = 306,448,687.61
  5. Step 5: Solve for x
    x = 306,448,687.61/20,877.09
  6. Step 6: Final answer
    x = 14,678.71

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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.