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Finding the Fourth Proportional to 15,170.91, 20,935.98 and 8,798.82

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Solution

The fourth proportional to 15,170.91, 20,935.98 and 8,798.82 is: 12,142.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,170.91 : 20,935.98 = 8,798.82 : x
  2. Step 2: Convert to fraction form
    15,170.91/20,935.98 = 8,798.82/x
  3. Step 3: Cross multiply
    15,170.91x = 20,935.98 × 8,798.82
  4. Step 4: Simplify right side
    15,170.91x = 184,211,919.54
  5. Step 5: Solve for x
    x = 184,211,919.54/15,170.91
  6. Step 6: Final answer
    x = 12,142.44

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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.