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Finding the Fourth Proportional to 18,863.16, 28,285.62 and 5,712.62

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Solution

The fourth proportional to 18,863.16, 28,285.62 and 5,712.62 is: 8,566.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.16 : 28,285.62 = 5,712.62 : x
  2. Step 2: Convert to fraction form
    18,863.16/28,285.62 = 5,712.62/x
  3. Step 3: Cross multiply
    18,863.16x = 28,285.62 × 5,712.62
  4. Step 4: Simplify right side
    18,863.16x = 161,584,857.10
  5. Step 5: Solve for x
    x = 161,584,857.10/18,863.16
  6. Step 6: Final answer
    x = 8,566.16

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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.