Home / 39,693.68-54,777.89-21,790.31

Finding the Fourth Proportional to 39,693.68, 54,777.89 and 21,790.31

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Solution

The fourth proportional to 39,693.68, 54,777.89 and 21,790.31 is: 30,070.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,693.68 : 54,777.89 = 21,790.31 : x
  2. Step 2: Convert to fraction form
    39,693.68/54,777.89 = 21,790.31/x
  3. Step 3: Cross multiply
    39,693.68x = 54,777.89 × 21,790.31
  4. Step 4: Simplify right side
    39,693.68x = 1,193,627,204.25
  5. Step 5: Solve for x
    x = 1,193,627,204.25/39,693.68
  6. Step 6: Final answer
    x = 30,070.96

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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.