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Finding the Fourth Proportional to 10,910.40, 16,365.60 and 10,813.20

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Solution

The fourth proportional to 10,910.40, 16,365.60 and 10,813.20 is: 16,219.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,910.40 : 16,365.60 = 10,813.20 : x
  2. Step 2: Convert to fraction form
    10,910.40/16,365.60 = 10,813.20/x
  3. Step 3: Cross multiply
    10,910.40x = 16,365.60 × 10,813.20
  4. Step 4: Simplify right side
    10,910.40x = 176,964,505.92
  5. Step 5: Solve for x
    x = 176,964,505.92/10,910.40
  6. Step 6: Final answer
    x = 16,219.80

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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.