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Finding the Fourth Proportional to 16,699.70, 22,999.11 and 12,908.90

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Solution

The fourth proportional to 16,699.70, 22,999.11 and 12,908.90 is: 17,778.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,699.70 : 22,999.11 = 12,908.90 : x
  2. Step 2: Convert to fraction form
    16,699.70/22,999.11 = 12,908.90/x
  3. Step 3: Cross multiply
    16,699.70x = 22,999.11 × 12,908.90
  4. Step 4: Simplify right side
    16,699.70x = 296,893,211.08
  5. Step 5: Solve for x
    x = 296,893,211.08/16,699.70
  6. Step 6: Final answer
    x = 17,778.36

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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.