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Finding the Fourth Proportional to 11,220.70, 16,831.05 and 7,284.10

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Solution

The fourth proportional to 11,220.70, 16,831.05 and 7,284.10 is: 10,926.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.70 : 16,831.05 = 7,284.10 : x
  2. Step 2: Convert to fraction form
    11,220.70/16,831.05 = 7,284.10/x
  3. Step 3: Cross multiply
    11,220.70x = 16,831.05 × 7,284.10
  4. Step 4: Simplify right side
    11,220.70x = 122,599,051.31
  5. Step 5: Solve for x
    x = 122,599,051.31/11,220.70
  6. Step 6: Final answer
    x = 10,926.15

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Similar ratio
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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.