Home / 20,611.72-28,405.38-18,935.56

Finding the Fourth Proportional to 20,611.72, 28,405.38 and 18,935.56

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Solution

The fourth proportional to 20,611.72, 28,405.38 and 18,935.56 is: 26,095.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.72 : 28,405.38 = 18,935.56 : x
  2. Step 2: Convert to fraction form
    20,611.72/28,405.38 = 18,935.56/x
  3. Step 3: Cross multiply
    20,611.72x = 28,405.38 × 18,935.56
  4. Step 4: Simplify right side
    20,611.72x = 537,871,777.31
  5. Step 5: Solve for x
    x = 537,871,777.31/20,611.72
  6. Step 6: Final answer
    x = 26,095.43

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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.