Home / 39,985.78-55,178.04-22,080.34

Finding the Fourth Proportional to 39,985.78, 55,178.04 and 22,080.34

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Solution

The fourth proportional to 39,985.78, 55,178.04 and 22,080.34 is: 30,469.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.78 : 55,178.04 = 22,080.34 : x
  2. Step 2: Convert to fraction form
    39,985.78/55,178.04 = 22,080.34/x
  3. Step 3: Cross multiply
    39,985.78x = 55,178.04 × 22,080.34
  4. Step 4: Simplify right side
    39,985.78x = 1,218,349,883.73
  5. Step 5: Solve for x
    x = 1,218,349,883.73/39,985.78
  6. Step 6: Final answer
    x = 30,469.58

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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.