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Finding the Fourth Proportional to 14,997.78, 20,698.20 and 8,709.75

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Solution

The fourth proportional to 14,997.78, 20,698.20 and 8,709.75 is: 12,020.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,997.78 : 20,698.20 = 8,709.75 : x
  2. Step 2: Convert to fraction form
    14,997.78/20,698.20 = 8,709.75/x
  3. Step 3: Cross multiply
    14,997.78x = 20,698.20 × 8,709.75
  4. Step 4: Simplify right side
    14,997.78x = 180,276,147.45
  5. Step 5: Solve for x
    x = 180,276,147.45/14,997.78
  6. Step 6: Final answer
    x = 12,020.19

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1.5x scale

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.