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Finding the Fourth Proportional to 18,640.36, 25,723.02 and 10,256.68

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Solution

The fourth proportional to 18,640.36, 25,723.02 and 10,256.68 is: 14,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.36 : 25,723.02 = 10,256.68 : x
  2. Step 2: Convert to fraction form
    18,640.36/25,723.02 = 10,256.68/x
  3. Step 3: Cross multiply
    18,640.36x = 25,723.02 × 10,256.68
  4. Step 4: Simplify right side
    18,640.36x = 263,832,784.77
  5. Step 5: Solve for x
    x = 263,832,784.77/18,640.36
  6. Step 6: Final answer
    x = 14,153.85

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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.