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Finding the Fourth Proportional to 13,889.60, 19,169.16 and 8,854

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Solution

The fourth proportional to 13,889.60, 19,169.16 and 8,854 is: 12,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.60 : 19,169.16 = 8,854 : x
  2. Step 2: Convert to fraction form
    13,889.60/19,169.16 = 8,854/x
  3. Step 3: Cross multiply
    13,889.60x = 19,169.16 × 8,854
  4. Step 4: Simplify right side
    13,889.60x = 169,723,742.64
  5. Step 5: Solve for x
    x = 169,723,742.64/13,889.60
  6. Step 6: Final answer
    x = 12,219.48

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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.