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Finding the Fourth Proportional to 13,901, 20,851.64 and 3,512.76

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Solution

The fourth proportional to 13,901, 20,851.64 and 3,512.76 is: 5,269.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,901 : 20,851.64 = 3,512.76 : x
  2. Step 2: Convert to fraction form
    13,901/20,851.64 = 3,512.76/x
  3. Step 3: Cross multiply
    13,901x = 20,851.64 × 3,512.76
  4. Step 4: Simplify right side
    13,901x = 73,246,806.93
  5. Step 5: Solve for x
    x = 73,246,806.93/13,901
  6. Step 6: Final answer
    x = 5,269.18

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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.