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Finding the Fourth Proportional to 28,199.78, 42,295.62 and 7,423.28

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Solution

The fourth proportional to 28,199.78, 42,295.62 and 7,423.28 is: 11,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.78 : 42,295.62 = 7,423.28 : x
  2. Step 2: Convert to fraction form
    28,199.78/42,295.62 = 7,423.28/x
  3. Step 3: Cross multiply
    28,199.78x = 42,295.62 × 7,423.28
  4. Step 4: Simplify right side
    28,199.78x = 313,972,230.03
  5. Step 5: Solve for x
    x = 313,972,230.03/28,199.78
  6. Step 6: Final answer
    x = 11,133.85

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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.