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Finding the Fourth Proportional to 15,138.88, 20,884.92 and 8,848.48

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Solution

The fourth proportional to 15,138.88, 20,884.92 and 8,848.48 is: 12,206.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.88 : 20,884.92 = 8,848.48 : x
  2. Step 2: Convert to fraction form
    15,138.88/20,884.92 = 8,848.48/x
  3. Step 3: Cross multiply
    15,138.88x = 20,884.92 × 8,848.48
  4. Step 4: Simplify right side
    15,138.88x = 184,799,796.92
  5. Step 5: Solve for x
    x = 184,799,796.92/15,138.88
  6. Step 6: Final answer
    x = 12,206.97

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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.