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Finding the Fourth Proportional to 18,611.79, 25,682.94 and 10,653.90

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Solution

The fourth proportional to 18,611.79, 25,682.94 and 10,653.90 is: 14,701.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.79 : 25,682.94 = 10,653.90 : x
  2. Step 2: Convert to fraction form
    18,611.79/25,682.94 = 10,653.90/x
  3. Step 3: Cross multiply
    18,611.79x = 25,682.94 × 10,653.90
  4. Step 4: Simplify right side
    18,611.79x = 273,623,474.47
  5. Step 5: Solve for x
    x = 273,623,474.47/18,611.79
  6. Step 6: Final answer
    x = 14,701.62

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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.