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Finding the Fourth Proportional to 9,990.90, 13,778.98 and 6,011.27

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Solution

The fourth proportional to 9,990.90, 13,778.98 and 6,011.27 is: 8,290.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.90 : 13,778.98 = 6,011.27 : x
  2. Step 2: Convert to fraction form
    9,990.90/13,778.98 = 6,011.27/x
  3. Step 3: Cross multiply
    9,990.90x = 13,778.98 × 6,011.27
  4. Step 4: Simplify right side
    9,990.90x = 82,829,136.85
  5. Step 5: Solve for x
    x = 82,829,136.85/9,990.90
  6. Step 6: Final answer
    x = 8,290.46

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1.5x scale

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.