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Finding the Fourth Proportional to 13,640.17, 20,460.17 and 3,508.53

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Solution

The fourth proportional to 13,640.17, 20,460.17 and 3,508.53 is: 5,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.17 : 20,460.17 = 3,508.53 : x
  2. Step 2: Convert to fraction form
    13,640.17/20,460.17 = 3,508.53/x
  3. Step 3: Cross multiply
    13,640.17x = 20,460.17 × 3,508.53
  4. Step 4: Simplify right side
    13,640.17x = 71,785,051.56
  5. Step 5: Solve for x
    x = 71,785,051.56/13,640.17
  6. Step 6: Final answer
    x = 5,262.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.