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Finding the Fourth Proportional to 39,641.86, 59,462.79 and 11,939.86

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Solution

The fourth proportional to 39,641.86, 59,462.79 and 11,939.86 is: 17,909.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,641.86 : 59,462.79 = 11,939.86 : x
  2. Step 2: Convert to fraction form
    39,641.86/59,462.79 = 11,939.86/x
  3. Step 3: Cross multiply
    39,641.86x = 59,462.79 × 11,939.86
  4. Step 4: Simplify right side
    39,641.86x = 709,977,387.81
  5. Step 5: Solve for x
    x = 709,977,387.81/39,641.86
  6. Step 6: Final answer
    x = 17,909.79

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1.5x scale

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.