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Finding the Fourth Proportional to 13,999.62, 21,009.15 and 8,167.62

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Solution

The fourth proportional to 13,999.62, 21,009.15 and 8,167.62 is: 12,257.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.62 : 21,009.15 = 8,167.62 : x
  2. Step 2: Convert to fraction form
    13,999.62/21,009.15 = 8,167.62/x
  3. Step 3: Cross multiply
    13,999.62x = 21,009.15 × 8,167.62
  4. Step 4: Simplify right side
    13,999.62x = 171,594,753.72
  5. Step 5: Solve for x
    x = 171,594,753.72/13,999.62
  6. Step 6: Final answer
    x = 12,257.10

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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.