Home / 31,519.15-43,502.89-18,779.80

Finding the Fourth Proportional to 31,519.15, 43,502.89 and 18,779.80

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Solution

The fourth proportional to 31,519.15, 43,502.89 and 18,779.80 is: 25,919.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,519.15 : 43,502.89 = 18,779.80 : x
  2. Step 2: Convert to fraction form
    31,519.15/43,502.89 = 18,779.80/x
  3. Step 3: Cross multiply
    31,519.15x = 43,502.89 × 18,779.80
  4. Step 4: Simplify right side
    31,519.15x = 816,975,455.47
  5. Step 5: Solve for x
    x = 816,975,455.47/31,519.15
  6. Step 6: Final answer
    x = 25,919.97

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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.