Home / 20,877.59-31,314.96-9,786.75

Finding the Fourth Proportional to 20,877.59, 31,314.96 and 9,786.75

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Solution

The fourth proportional to 20,877.59, 31,314.96 and 9,786.75 is: 14,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.59 : 31,314.96 = 9,786.75 : x
  2. Step 2: Convert to fraction form
    20,877.59/31,314.96 = 9,786.75/x
  3. Step 3: Cross multiply
    20,877.59x = 31,314.96 × 9,786.75
  4. Step 4: Simplify right side
    20,877.59x = 306,471,684.78
  5. Step 5: Solve for x
    x = 306,471,684.78/20,877.59
  6. Step 6: Final answer
    x = 14,679.46

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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.