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Finding the Fourth Proportional to 18,792.56, 28,154.04 and 9,421.64

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Solution

The fourth proportional to 18,792.56, 28,154.04 and 9,421.64 is: 14,115.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.56 : 28,154.04 = 9,421.64 : x
  2. Step 2: Convert to fraction form
    18,792.56/28,154.04 = 9,421.64/x
  3. Step 3: Cross multiply
    18,792.56x = 28,154.04 × 9,421.64
  4. Step 4: Simplify right side
    18,792.56x = 265,257,229.43
  5. Step 5: Solve for x
    x = 265,257,229.43/18,792.56
  6. Step 6: Final answer
    x = 14,115.01

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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.