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Finding the Fourth Proportional to 39,709.80, 59,564.67 and 12,007.80

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Solution

The fourth proportional to 39,709.80, 59,564.67 and 12,007.80 is: 18,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,709.80 : 59,564.67 = 12,007.80 : x
  2. Step 2: Convert to fraction form
    39,709.80/59,564.67 = 12,007.80/x
  3. Step 3: Cross multiply
    39,709.80x = 59,564.67 × 12,007.80
  4. Step 4: Simplify right side
    39,709.80x = 715,240,644.43
  5. Step 5: Solve for x
    x = 715,240,644.43/39,709.80
  6. Step 6: Final answer
    x = 18,011.69

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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.