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Finding the Fourth Proportional to 39,661.80, 59,488.65 and 13,366.77

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Solution

The fourth proportional to 39,661.80, 59,488.65 and 13,366.77 is: 20,048.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,661.80 : 59,488.65 = 13,366.77 : x
  2. Step 2: Convert to fraction form
    39,661.80/59,488.65 = 13,366.77/x
  3. Step 3: Cross multiply
    39,661.80x = 59,488.65 × 13,366.77
  4. Step 4: Simplify right side
    39,661.80x = 795,171,102.16
  5. Step 5: Solve for x
    x = 795,171,102.16/39,661.80
  6. Step 6: Final answer
    x = 20,048.79

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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.