Home / 39,690.72-54,773.82-21,787.38

Finding the Fourth Proportional to 39,690.72, 54,773.82 and 21,787.38

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Solution

The fourth proportional to 39,690.72, 54,773.82 and 21,787.38 is: 30,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.72 : 54,773.82 = 21,787.38 : x
  2. Step 2: Convert to fraction form
    39,690.72/54,773.82 = 21,787.38/x
  3. Step 3: Cross multiply
    39,690.72x = 54,773.82 × 21,787.38
  4. Step 4: Simplify right side
    39,690.72x = 1,193,378,030.39
  5. Step 5: Solve for x
    x = 1,193,378,030.39/39,690.72
  6. Step 6: Final answer
    x = 30,066.93

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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.