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Finding the Fourth Proportional to 13,659.17, 20,490.91 and 4,893.89

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Solution

The fourth proportional to 13,659.17, 20,490.91 and 4,893.89 is: 7,341.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.17 : 20,490.91 = 4,893.89 : x
  2. Step 2: Convert to fraction form
    13,659.17/20,490.91 = 4,893.89/x
  3. Step 3: Cross multiply
    13,659.17x = 20,490.91 × 4,893.89
  4. Step 4: Simplify right side
    13,659.17x = 100,280,259.54
  5. Step 5: Solve for x
    x = 100,280,259.54/13,659.17
  6. Step 6: Final answer
    x = 7,341.61

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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.