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Finding the Fourth Proportional to 8,990.61, 13,485.92 and 3,148.89

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Solution

The fourth proportional to 8,990.61, 13,485.92 and 3,148.89 is: 4,723.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.61 : 13,485.92 = 3,148.89 : x
  2. Step 2: Convert to fraction form
    8,990.61/13,485.92 = 3,148.89/x
  3. Step 3: Cross multiply
    8,990.61x = 13,485.92 × 3,148.89
  4. Step 4: Simplify right side
    8,990.61x = 42,465,662.88
  5. Step 5: Solve for x
    x = 42,465,662.88/8,990.61
  6. Step 6: Final answer
    x = 4,723.34

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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.