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Finding the Fourth Proportional to 13,642.89, 18,832.16 and 8,610.39

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Solution

The fourth proportional to 13,642.89, 18,832.16 and 8,610.39 is: 11,885.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.89 : 18,832.16 = 8,610.39 : x
  2. Step 2: Convert to fraction form
    13,642.89/18,832.16 = 8,610.39/x
  3. Step 3: Cross multiply
    13,642.89x = 18,832.16 × 8,610.39
  4. Step 4: Simplify right side
    13,642.89x = 162,152,242.14
  5. Step 5: Solve for x
    x = 162,152,242.14/13,642.89
  6. Step 6: Final answer
    x = 11,885.48

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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.