Home / 39,135.98-54,007.62-21,231.02

Finding the Fourth Proportional to 39,135.98, 54,007.62 and 21,231.02

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Solution

The fourth proportional to 39,135.98, 54,007.62 and 21,231.02 is: 29,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,135.98 : 54,007.62 = 21,231.02 : x
  2. Step 2: Convert to fraction form
    39,135.98/54,007.62 = 21,231.02/x
  3. Step 3: Cross multiply
    39,135.98x = 54,007.62 × 21,231.02
  4. Step 4: Simplify right side
    39,135.98x = 1,146,636,860.37
  5. Step 5: Solve for x
    x = 1,146,636,860.37/39,135.98
  6. Step 6: Final answer
    x = 29,298.79

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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.