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Finding the Fourth Proportional to 18,830.70, 28,258.20 and 10,933.20

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Solution

The fourth proportional to 18,830.70, 28,258.20 and 10,933.20 is: 16,406.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.70 : 28,258.20 = 10,933.20 : x
  2. Step 2: Convert to fraction form
    18,830.70/28,258.20 = 10,933.20/x
  3. Step 3: Cross multiply
    18,830.70x = 28,258.20 × 10,933.20
  4. Step 4: Simplify right side
    18,830.70x = 308,952,552.24
  5. Step 5: Solve for x
    x = 308,952,552.24/18,830.70
  6. Step 6: Final answer
    x = 16,406.85

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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.