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Finding the Fourth Proportional to 17,885.76, 26,808 and 13,135.20

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Solution

The fourth proportional to 17,885.76, 26,808 and 13,135.20 is: 19,687.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,885.76 : 26,808 = 13,135.20 : x
  2. Step 2: Convert to fraction form
    17,885.76/26,808 = 13,135.20/x
  3. Step 3: Cross multiply
    17,885.76x = 26,808 × 13,135.20
  4. Step 4: Simplify right side
    17,885.76x = 352,128,441.60
  5. Step 5: Solve for x
    x = 352,128,441.60/17,885.76
  6. Step 6: Final answer
    x = 19,687.64

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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.