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Finding the Fourth Proportional to 18,771.52, 28,153.12 and 5,622.16

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Solution

The fourth proportional to 18,771.52, 28,153.12 and 5,622.16 is: 8,431.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.52 : 28,153.12 = 5,622.16 : x
  2. Step 2: Convert to fraction form
    18,771.52/28,153.12 = 5,622.16/x
  3. Step 3: Cross multiply
    18,771.52x = 28,153.12 × 5,622.16
  4. Step 4: Simplify right side
    18,771.52x = 158,281,345.14
  5. Step 5: Solve for x
    x = 158,281,345.14/18,771.52
  6. Step 6: Final answer
    x = 8,431.99

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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.