Home / 31,779.96-43,851.77-20,464.80

Finding the Fourth Proportional to 31,779.96, 43,851.77 and 20,464.80

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Solution

The fourth proportional to 31,779.96, 43,851.77 and 20,464.80 is: 28,238.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,779.96 : 43,851.77 = 20,464.80 : x
  2. Step 2: Convert to fraction form
    31,779.96/43,851.77 = 20,464.80/x
  3. Step 3: Cross multiply
    31,779.96x = 43,851.77 × 20,464.80
  4. Step 4: Simplify right side
    31,779.96x = 897,417,702.70
  5. Step 5: Solve for x
    x = 897,417,702.70/31,779.96
  6. Step 6: Final answer
    x = 28,238.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.