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Finding the Fourth Proportional to 18,752.89, 28,143.18 and 8,892.21

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Solution

The fourth proportional to 18,752.89, 28,143.18 and 8,892.21 is: 13,344.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,752.89 : 28,143.18 = 8,892.21 : x
  2. Step 2: Convert to fraction form
    18,752.89/28,143.18 = 8,892.21/x
  3. Step 3: Cross multiply
    18,752.89x = 28,143.18 × 8,892.21
  4. Step 4: Simplify right side
    18,752.89x = 250,255,066.63
  5. Step 5: Solve for x
    x = 250,255,066.63/18,752.89
  6. Step 6: Final answer
    x = 13,344.88

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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.