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Finding the Fourth Proportional to 8,990.98, 13,486.05 and 3,148.90

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Solution

The fourth proportional to 8,990.98, 13,486.05 and 3,148.90 is: 4,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.98 : 13,486.05 = 3,148.90 : x
  2. Step 2: Convert to fraction form
    8,990.98/13,486.05 = 3,148.90/x
  3. Step 3: Cross multiply
    8,990.98x = 13,486.05 × 3,148.90
  4. Step 4: Simplify right side
    8,990.98x = 42,466,222.85
  5. Step 5: Solve for x
    x = 42,466,222.85/8,990.98
  6. Step 6: Final answer
    x = 4,723.20

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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.