Home / 39,709.78-54,799.09-21,804.62

Finding the Fourth Proportional to 39,709.78, 54,799.09 and 21,804.62

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Solution

The fourth proportional to 39,709.78, 54,799.09 and 21,804.62 is: 30,090.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,709.78 : 54,799.09 = 21,804.62 : x
  2. Step 2: Convert to fraction form
    39,709.78/54,799.09 = 21,804.62/x
  3. Step 3: Cross multiply
    39,709.78x = 54,799.09 × 21,804.62
  4. Step 4: Simplify right side
    39,709.78x = 1,194,873,005.29
  5. Step 5: Solve for x
    x = 1,194,873,005.29/39,709.78
  6. Step 6: Final answer
    x = 30,090.15

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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.