Home / 20,676.28-31,008.88-8,986.80

Finding the Fourth Proportional to 20,676.28, 31,008.88 and 8,986.80

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Solution

The fourth proportional to 20,676.28, 31,008.88 and 8,986.80 is: 13,477.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.28 : 31,008.88 = 8,986.80 : x
  2. Step 2: Convert to fraction form
    20,676.28/31,008.88 = 8,986.80/x
  3. Step 3: Cross multiply
    20,676.28x = 31,008.88 × 8,986.80
  4. Step 4: Simplify right side
    20,676.28x = 278,670,602.78
  5. Step 5: Solve for x
    x = 278,670,602.78/20,676.28
  6. Step 6: Final answer
    x = 13,477.79

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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.