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Finding the Fourth Proportional to 39,487.75, 59,241.89 and 11,785.75

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Solution

The fourth proportional to 39,487.75, 59,241.89 and 11,785.75 is: 17,681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,487.75 : 59,241.89 = 11,785.75 : x
  2. Step 2: Convert to fraction form
    39,487.75/59,241.89 = 11,785.75/x
  3. Step 3: Cross multiply
    39,487.75x = 59,241.89 × 11,785.75
  4. Step 4: Simplify right side
    39,487.75x = 698,210,105.07
  5. Step 5: Solve for x
    x = 698,210,105.07/39,487.75
  6. Step 6: Final answer
    x = 17,681.69

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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.