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Finding the Fourth Proportional to 8,502.12, 11,728.80 and 5,518.44

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Solution

The fourth proportional to 8,502.12, 11,728.80 and 5,518.44 is: 7,612.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,502.12 : 11,728.80 = 5,518.44 : x
  2. Step 2: Convert to fraction form
    8,502.12/11,728.80 = 5,518.44/x
  3. Step 3: Cross multiply
    8,502.12x = 11,728.80 × 5,518.44
  4. Step 4: Simplify right side
    8,502.12x = 64,724,679.07
  5. Step 5: Solve for x
    x = 64,724,679.07/8,502.12
  6. Step 6: Final answer
    x = 7,612.77

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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.