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Finding the Fourth Proportional to 39,688.56, 59,532.85 and 11,986.56

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Solution

The fourth proportional to 39,688.56, 59,532.85 and 11,986.56 is: 17,979.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.56 : 59,532.85 = 11,986.56 : x
  2. Step 2: Convert to fraction form
    39,688.56/59,532.85 = 11,986.56/x
  3. Step 3: Cross multiply
    39,688.56x = 59,532.85 × 11,986.56
  4. Step 4: Simplify right side
    39,688.56x = 713,594,167.40
  5. Step 5: Solve for x
    x = 713,594,167.40/39,688.56
  6. Step 6: Final answer
    x = 17,979.84

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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.