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Finding the Fourth Proportional to 12,548.79, 18,826.32 and 8,858.22

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Solution

The fourth proportional to 12,548.79, 18,826.32 and 8,858.22 is: 13,289.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,548.79 : 18,826.32 = 8,858.22 : x
  2. Step 2: Convert to fraction form
    12,548.79/18,826.32 = 8,858.22/x
  3. Step 3: Cross multiply
    12,548.79x = 18,826.32 × 8,858.22
  4. Step 4: Simplify right side
    12,548.79x = 166,767,684.35
  5. Step 5: Solve for x
    x = 166,767,684.35/12,548.79
  6. Step 6: Final answer
    x = 13,289.54

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1.5x scale

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.