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Finding the Fourth Proportional to 22,006.40, 33,009.60 and 20,451.20

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Solution

The fourth proportional to 22,006.40, 33,009.60 and 20,451.20 is: 30,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,006.40 : 33,009.60 = 20,451.20 : x
  2. Step 2: Convert to fraction form
    22,006.40/33,009.60 = 20,451.20/x
  3. Step 3: Cross multiply
    22,006.40x = 33,009.60 × 20,451.20
  4. Step 4: Simplify right side
    22,006.40x = 675,085,931.52
  5. Step 5: Solve for x
    x = 675,085,931.52/22,006.40
  6. Step 6: Final answer
    x = 30,676.80

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Half scale
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Double scale
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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.