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Finding the Fourth Proportional to 13,699.06, 18,916.22 and 8,672.16

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Solution

The fourth proportional to 13,699.06, 18,916.22 and 8,672.16 is: 11,974.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.06 : 18,916.22 = 8,672.16 : x
  2. Step 2: Convert to fraction form
    13,699.06/18,916.22 = 8,672.16/x
  3. Step 3: Cross multiply
    13,699.06x = 18,916.22 × 8,672.16
  4. Step 4: Simplify right side
    13,699.06x = 164,044,486.44
  5. Step 5: Solve for x
    x = 164,044,486.44/13,699.06
  6. Step 6: Final answer
    x = 11,974.87

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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.