Home / 38,977.40-53,788.68-21,072.38

Finding the Fourth Proportional to 38,977.40, 53,788.68 and 21,072.38

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Solution

The fourth proportional to 38,977.40, 53,788.68 and 21,072.38 is: 29,079.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,977.40 : 53,788.68 = 21,072.38 : x
  2. Step 2: Convert to fraction form
    38,977.40/53,788.68 = 21,072.38/x
  3. Step 3: Cross multiply
    38,977.40x = 53,788.68 × 21,072.38
  4. Step 4: Simplify right side
    38,977.40x = 1,133,455,504.66
  5. Step 5: Solve for x
    x = 1,133,455,504.66/38,977.40
  6. Step 6: Final answer
    x = 29,079.81

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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.