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Finding the Fourth Proportional to 13,355.16, 18,437.62 and 8,885

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Solution

The fourth proportional to 13,355.16, 18,437.62 and 8,885 is: 12,266.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.16 : 18,437.62 = 8,885 : x
  2. Step 2: Convert to fraction form
    13,355.16/18,437.62 = 8,885/x
  3. Step 3: Cross multiply
    13,355.16x = 18,437.62 × 8,885
  4. Step 4: Simplify right side
    13,355.16x = 163,818,253.70
  5. Step 5: Solve for x
    x = 163,818,253.70/13,355.16
  6. Step 6: Final answer
    x = 12,266.29

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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.