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Finding the Fourth Proportional to 15,018.14, 20,724.50 and 8,212.32

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Solution

The fourth proportional to 15,018.14, 20,724.50 and 8,212.32 is: 11,332.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.14 : 20,724.50 = 8,212.32 : x
  2. Step 2: Convert to fraction form
    15,018.14/20,724.50 = 8,212.32/x
  3. Step 3: Cross multiply
    15,018.14x = 20,724.50 × 8,212.32
  4. Step 4: Simplify right side
    15,018.14x = 170,196,168.65
  5. Step 5: Solve for x
    x = 170,196,168.65/15,018.14
  6. Step 6: Final answer
    x = 11,332.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.