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Finding the Fourth Proportional to 8,990.06, 12,400.08 and 8,246.48

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Solution

The fourth proportional to 8,990.06, 12,400.08 and 8,246.48 is: 11,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.06 : 12,400.08 = 8,246.48 : x
  2. Step 2: Convert to fraction form
    8,990.06/12,400.08 = 8,246.48/x
  3. Step 3: Cross multiply
    8,990.06x = 12,400.08 × 8,246.48
  4. Step 4: Simplify right side
    8,990.06x = 102,257,011.72
  5. Step 5: Solve for x
    x = 102,257,011.72/8,990.06
  6. Step 6: Final answer
    x = 11,374.45

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Half scale
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Double scale
Find fourth proportional to 8,991.06, 12,401.46 and 8,247.48
Similar ratio
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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.