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Finding the Fourth Proportional to 39,776.77, 59,664.09 and 9,791.28

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Solution

The fourth proportional to 39,776.77, 59,664.09 and 9,791.28 is: 14,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,776.77 : 59,664.09 = 9,791.28 : x
  2. Step 2: Convert to fraction form
    39,776.77/59,664.09 = 9,791.28/x
  3. Step 3: Cross multiply
    39,776.77x = 59,664.09 × 9,791.28
  4. Step 4: Simplify right side
    39,776.77x = 584,187,811.14
  5. Step 5: Solve for x
    x = 584,187,811.14/39,776.77
  6. Step 6: Final answer
    x = 14,686.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.