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Finding the Fourth Proportional to 15,102.96, 20,842.07 and 8,815.33

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Solution

The fourth proportional to 15,102.96, 20,842.07 and 8,815.33 is: 12,165.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.96 : 20,842.07 = 8,815.33 : x
  2. Step 2: Convert to fraction form
    15,102.96/20,842.07 = 8,815.33/x
  3. Step 3: Cross multiply
    15,102.96x = 20,842.07 × 8,815.33
  4. Step 4: Simplify right side
    15,102.96x = 183,729,724.93
  5. Step 5: Solve for x
    x = 183,729,724.93/15,102.96
  6. Step 6: Final answer
    x = 12,165.15

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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.