Home / 39,684.72-54,765.42-21,779.30

Finding the Fourth Proportional to 39,684.72, 54,765.42 and 21,779.30

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Solution

The fourth proportional to 39,684.72, 54,765.42 and 21,779.30 is: 30,055.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.72 : 54,765.42 = 21,779.30 : x
  2. Step 2: Convert to fraction form
    39,684.72/54,765.42 = 21,779.30/x
  3. Step 3: Cross multiply
    39,684.72x = 54,765.42 × 21,779.30
  4. Step 4: Simplify right side
    39,684.72x = 1,192,752,511.81
  5. Step 5: Solve for x
    x = 1,192,752,511.81/39,684.72
  6. Step 6: Final answer
    x = 30,055.71

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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.