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Finding the Fourth Proportional to 18,612.72, 25,686 and 10,657.44

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Solution

The fourth proportional to 18,612.72, 25,686 and 10,657.44 is: 14,707.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.72 : 25,686 = 10,657.44 : x
  2. Step 2: Convert to fraction form
    18,612.72/25,686 = 10,657.44/x
  3. Step 3: Cross multiply
    18,612.72x = 25,686 × 10,657.44
  4. Step 4: Simplify right side
    18,612.72x = 273,747,003.84
  5. Step 5: Solve for x
    x = 273,747,003.84/18,612.72
  6. Step 6: Final answer
    x = 14,707.52

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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.