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Finding the Fourth Proportional to 28,324.87, 39,086.80 and 16,388.40

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Solution

The fourth proportional to 28,324.87, 39,086.80 and 16,388.40 is: 22,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,324.87 : 39,086.80 = 16,388.40 : x
  2. Step 2: Convert to fraction form
    28,324.87/39,086.80 = 16,388.40/x
  3. Step 3: Cross multiply
    28,324.87x = 39,086.80 × 16,388.40
  4. Step 4: Simplify right side
    28,324.87x = 640,570,113.12
  5. Step 5: Solve for x
    x = 640,570,113.12/28,324.87
  6. Step 6: Final answer
    x = 22,615.11

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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.