Home / 10,817.21-16,220.01-5,550.05

Finding the Fourth Proportional to 10,817.21, 16,220.01 and 5,550.05

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Solution

The fourth proportional to 10,817.21, 16,220.01 and 5,550.05 is: 8,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,817.21 : 16,220.01 = 5,550.05 : x
  2. Step 2: Convert to fraction form
    10,817.21/16,220.01 = 5,550.05/x
  3. Step 3: Cross multiply
    10,817.21x = 16,220.01 × 5,550.05
  4. Step 4: Simplify right side
    10,817.21x = 90,021,866.50
  5. Step 5: Solve for x
    x = 90,021,866.50/10,817.21
  6. Step 6: Final answer
    x = 8,322.10

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Double scale
Find fourth proportional to 10,818.21, 16,221.51 and 5,551.05
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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.