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Finding the Fourth Proportional to 28,954.77, 39,939.39 and 22,230.15

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Solution

The fourth proportional to 28,954.77, 39,939.39 and 22,230.15 is: 30,663.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,954.77 : 39,939.39 = 22,230.15 : x
  2. Step 2: Convert to fraction form
    28,954.77/39,939.39 = 22,230.15/x
  3. Step 3: Cross multiply
    28,954.77x = 39,939.39 × 22,230.15
  4. Step 4: Simplify right side
    28,954.77x = 887,858,630.61
  5. Step 5: Solve for x
    x = 887,858,630.61/28,954.77
  6. Step 6: Final answer
    x = 30,663.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.