Home / 20,779.43-31,151.80-9,680.41

Finding the Fourth Proportional to 20,779.43, 31,151.80 and 9,680.41

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Solution

The fourth proportional to 20,779.43, 31,151.80 and 9,680.41 is: 14,512.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.43 : 31,151.80 = 9,680.41 : x
  2. Step 2: Convert to fraction form
    20,779.43/31,151.80 = 9,680.41/x
  3. Step 3: Cross multiply
    20,779.43x = 31,151.80 × 9,680.41
  4. Step 4: Simplify right side
    20,779.43x = 301,561,992.08
  5. Step 5: Solve for x
    x = 301,561,992.08/20,779.43
  6. Step 6: Final answer
    x = 14,512.52

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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.