Home / 39,693.74-54,777.30-21,788.78

Finding the Fourth Proportional to 39,693.74, 54,777.30 and 21,788.78

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Solution

The fourth proportional to 39,693.74, 54,777.30 and 21,788.78 is: 30,068.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,693.74 : 54,777.30 = 21,788.78 : x
  2. Step 2: Convert to fraction form
    39,693.74/54,777.30 = 21,788.78/x
  3. Step 3: Cross multiply
    39,693.74x = 54,777.30 × 21,788.78
  4. Step 4: Simplify right side
    39,693.74x = 1,193,530,538.69
  5. Step 5: Solve for x
    x = 1,193,530,538.69/39,693.74
  6. Step 6: Final answer
    x = 30,068.48

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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.