Home / 39,693.98-54,778.38-21,790.64

Finding the Fourth Proportional to 39,693.98, 54,778.38 and 21,790.64

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Solution

The fourth proportional to 39,693.98, 54,778.38 and 21,790.64 is: 30,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,693.98 : 54,778.38 = 21,790.64 : x
  2. Step 2: Convert to fraction form
    39,693.98/54,778.38 = 21,790.64/x
  3. Step 3: Cross multiply
    39,693.98x = 54,778.38 × 21,790.64
  4. Step 4: Simplify right side
    39,693.98x = 1,193,655,958.36
  5. Step 5: Solve for x
    x = 1,193,655,958.36/39,693.98
  6. Step 6: Final answer
    x = 30,071.46

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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.