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Finding the Fourth Proportional to 30,149.78, 45,223.73 and 7,963.28

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Solution

The fourth proportional to 30,149.78, 45,223.73 and 7,963.28 is: 11,944.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,149.78 : 45,223.73 = 7,963.28 : x
  2. Step 2: Convert to fraction form
    30,149.78/45,223.73 = 7,963.28/x
  3. Step 3: Cross multiply
    30,149.78x = 45,223.73 × 7,963.28
  4. Step 4: Simplify right side
    30,149.78x = 360,128,958.70
  5. Step 5: Solve for x
    x = 360,128,958.70/30,149.78
  6. Step 6: Final answer
    x = 11,944.66

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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.