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Finding the Fourth Proportional to 18,880.29, 28,320.48 and 5,029.29

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Solution

The fourth proportional to 18,880.29, 28,320.48 and 5,029.29 is: 7,543.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880.29 : 28,320.48 = 5,029.29 : x
  2. Step 2: Convert to fraction form
    18,880.29/28,320.48 = 5,029.29/x
  3. Step 3: Cross multiply
    18,880.29x = 28,320.48 × 5,029.29
  4. Step 4: Simplify right side
    18,880.29x = 142,431,906.86
  5. Step 5: Solve for x
    x = 142,431,906.86/18,880.29
  6. Step 6: Final answer
    x = 7,543.95

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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.