Home / 20,779.25-31,182.55-7,631.74

Finding the Fourth Proportional to 20,779.25, 31,182.55 and 7,631.74

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Solution

The fourth proportional to 20,779.25, 31,182.55 and 7,631.74 is: 11,452.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.25 : 31,182.55 = 7,631.74 : x
  2. Step 2: Convert to fraction form
    20,779.25/31,182.55 = 7,631.74/x
  3. Step 3: Cross multiply
    20,779.25x = 31,182.55 × 7,631.74
  4. Step 4: Simplify right side
    20,779.25x = 237,977,001.56
  5. Step 5: Solve for x
    x = 237,977,001.56/20,779.25
  6. Step 6: Final answer
    x = 11,452.63

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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.