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Finding the Fourth Proportional to 12,561.64, 18,845.62 and 8,871.08

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Solution

The fourth proportional to 12,561.64, 18,845.62 and 8,871.08 is: 13,308.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.64 : 18,845.62 = 8,871.08 : x
  2. Step 2: Convert to fraction form
    12,561.64/18,845.62 = 8,871.08/x
  3. Step 3: Cross multiply
    12,561.64x = 18,845.62 × 8,871.08
  4. Step 4: Simplify right side
    12,561.64x = 167,180,886.26
  5. Step 5: Solve for x
    x = 167,180,886.26/12,561.64
  6. Step 6: Final answer
    x = 13,308.84

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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.