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Finding the Fourth Proportional to 13,901.46, 20,852.21 and 3,513.21

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Solution

The fourth proportional to 13,901.46, 20,852.21 and 3,513.21 is: 5,269.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,901.46 : 20,852.21 = 3,513.21 : x
  2. Step 2: Convert to fraction form
    13,901.46/20,852.21 = 3,513.21/x
  3. Step 3: Cross multiply
    13,901.46x = 20,852.21 × 3,513.21
  4. Step 4: Simplify right side
    13,901.46x = 73,258,175.13
  5. Step 5: Solve for x
    x = 73,258,175.13/13,901.46
  6. Step 6: Final answer
    x = 5,269.82

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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.