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Finding the Fourth Proportional to 13,487.54, 18,612.12 and 8,451.98

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Solution

The fourth proportional to 13,487.54, 18,612.12 and 8,451.98 is: 11,663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.54 : 18,612.12 = 8,451.98 : x
  2. Step 2: Convert to fraction form
    13,487.54/18,612.12 = 8,451.98/x
  3. Step 3: Cross multiply
    13,487.54x = 18,612.12 × 8,451.98
  4. Step 4: Simplify right side
    13,487.54x = 157,309,266.00
  5. Step 5: Solve for x
    x = 157,309,266.00/13,487.54
  6. Step 6: Final answer
    x = 11,663.30

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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.