Home / 20,779.38-31,176.36-9,100.80

Finding the Fourth Proportional to 20,779.38, 31,176.36 and 9,100.80

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Solution

The fourth proportional to 20,779.38, 31,176.36 and 9,100.80 is: 13,654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.38 : 31,176.36 = 9,100.80 : x
  2. Step 2: Convert to fraction form
    20,779.38/31,176.36 = 9,100.80/x
  3. Step 3: Cross multiply
    20,779.38x = 31,176.36 × 9,100.80
  4. Step 4: Simplify right side
    20,779.38x = 283,729,817.09
  5. Step 5: Solve for x
    x = 283,729,817.09/20,779.38
  6. Step 6: Final answer
    x = 13,654.39

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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.