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Finding the Fourth Proportional to 39,860, 55,006.80 and 23,102.72

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Solution

The fourth proportional to 39,860, 55,006.80 and 23,102.72 is: 31,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860 : 55,006.80 = 23,102.72 : x
  2. Step 2: Convert to fraction form
    39,860/55,006.80 = 23,102.72/x
  3. Step 3: Cross multiply
    39,860x = 55,006.80 × 23,102.72
  4. Step 4: Simplify right side
    39,860x = 1,270,806,698.50
  5. Step 5: Solve for x
    x = 1,270,806,698.50/39,860
  6. Step 6: Final answer
    x = 31,881.75

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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.