Home / 28,629.78-39,512.61-18,019.86

Finding the Fourth Proportional to 28,629.78, 39,512.61 and 18,019.86

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Solution

The fourth proportional to 28,629.78, 39,512.61 and 18,019.86 is: 24,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.78 : 39,512.61 = 18,019.86 : x
  2. Step 2: Convert to fraction form
    28,629.78/39,512.61 = 18,019.86/x
  3. Step 3: Cross multiply
    28,629.78x = 39,512.61 × 18,019.86
  4. Step 4: Simplify right side
    28,629.78x = 712,011,700.43
  5. Step 5: Solve for x
    x = 712,011,700.43/28,629.78
  6. Step 6: Final answer
    x = 24,869.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.