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Finding the Fourth Proportional to 18,816.70, 28,220.55 and 10,902.10

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Solution

The fourth proportional to 18,816.70, 28,220.55 and 10,902.10 is: 16,350.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.70 : 28,220.55 = 10,902.10 : x
  2. Step 2: Convert to fraction form
    18,816.70/28,220.55 = 10,902.10/x
  3. Step 3: Cross multiply
    18,816.70x = 28,220.55 × 10,902.10
  4. Step 4: Simplify right side
    18,816.70x = 307,663,258.16
  5. Step 5: Solve for x
    x = 307,663,258.16/18,816.70
  6. Step 6: Final answer
    x = 16,350.54

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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.