Home / 22,779.36-31,435.55-13,221.11

Finding the Fourth Proportional to 22,779.36, 31,435.55 and 13,221.11

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Solution

The fourth proportional to 22,779.36, 31,435.55 and 13,221.11 is: 18,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,779.36 : 31,435.55 = 13,221.11 : x
  2. Step 2: Convert to fraction form
    22,779.36/31,435.55 = 13,221.11/x
  3. Step 3: Cross multiply
    22,779.36x = 31,435.55 × 13,221.11
  4. Step 4: Simplify right side
    22,779.36x = 415,612,926.52
  5. Step 5: Solve for x
    x = 415,612,926.52/22,779.36
  6. Step 6: Final answer
    x = 18,245.15

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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.