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Finding the Fourth Proportional to 18,891.43, 28,337.61 and 8,359.21

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Solution

The fourth proportional to 18,891.43, 28,337.61 and 8,359.21 is: 12,539.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.43 : 28,337.61 = 8,359.21 : x
  2. Step 2: Convert to fraction form
    18,891.43/28,337.61 = 8,359.21/x
  3. Step 3: Cross multiply
    18,891.43x = 28,337.61 × 8,359.21
  4. Step 4: Simplify right side
    18,891.43x = 236,880,032.89
  5. Step 5: Solve for x
    x = 236,880,032.89/18,891.43
  6. Step 6: Final answer
    x = 12,539.02

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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.