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Finding the Fourth Proportional to 18,689.94, 25,793.73 and 11,236.50

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Solution

The fourth proportional to 18,689.94, 25,793.73 and 11,236.50 is: 15,507.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.94 : 25,793.73 = 11,236.50 : x
  2. Step 2: Convert to fraction form
    18,689.94/25,793.73 = 11,236.50/x
  3. Step 3: Cross multiply
    18,689.94x = 25,793.73 × 11,236.50
  4. Step 4: Simplify right side
    18,689.94x = 289,831,247.15
  5. Step 5: Solve for x
    x = 289,831,247.15/18,689.94
  6. Step 6: Final answer
    x = 15,507.34

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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.