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Finding the Fourth Proportional to 58,009.48, 86,989.61 and 20,578.97

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Solution

The fourth proportional to 58,009.48, 86,989.61 and 20,578.97 is: 30,859.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,009.48 : 86,989.61 = 20,578.97 : x
  2. Step 2: Convert to fraction form
    58,009.48/86,989.61 = 20,578.97/x
  3. Step 3: Cross multiply
    58,009.48x = 86,989.61 × 20,578.97
  4. Step 4: Simplify right side
    58,009.48x = 1,790,156,843.42
  5. Step 5: Solve for x
    x = 1,790,156,843.42/58,009.48
  6. Step 6: Final answer
    x = 30,859.73

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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.