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Finding the Fourth Proportional to 13,365, 18,431.15 and 9,606.80

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Solution

The fourth proportional to 13,365, 18,431.15 and 9,606.80 is: 13,248.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,365 : 18,431.15 = 9,606.80 : x
  2. Step 2: Convert to fraction form
    13,365/18,431.15 = 9,606.80/x
  3. Step 3: Cross multiply
    13,365x = 18,431.15 × 9,606.80
  4. Step 4: Simplify right side
    13,365x = 177,064,369.86
  5. Step 5: Solve for x
    x = 177,064,369.86/13,365
  6. Step 6: Final answer
    x = 13,248.36

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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.