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Finding the Fourth Proportional to 18,881.63, 28,320.61 and 5,734.12

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Solution

The fourth proportional to 18,881.63, 28,320.61 and 5,734.12 is: 8,600.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.63 : 28,320.61 = 5,734.12 : x
  2. Step 2: Convert to fraction form
    18,881.63/28,320.61 = 5,734.12/x
  3. Step 3: Cross multiply
    18,881.63x = 28,320.61 × 5,734.12
  4. Step 4: Simplify right side
    18,881.63x = 162,393,634.61
  5. Step 5: Solve for x
    x = 162,393,634.61/18,881.63
  6. Step 6: Final answer
    x = 8,600.62

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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.