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Finding the Fourth Proportional to 15,088.44, 20,820.90 and 8,712.12

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Solution

The fourth proportional to 15,088.44, 20,820.90 and 8,712.12 is: 12,022.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,088.44 : 20,820.90 = 8,712.12 : x
  2. Step 2: Convert to fraction form
    15,088.44/20,820.90 = 8,712.12/x
  3. Step 3: Cross multiply
    15,088.44x = 20,820.90 × 8,712.12
  4. Step 4: Simplify right side
    15,088.44x = 181,394,241.05
  5. Step 5: Solve for x
    x = 181,394,241.05/15,088.44
  6. Step 6: Final answer
    x = 12,022.06

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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.