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Finding the Fourth Proportional to 13.76, 20.52 and 13.01

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Solution

The fourth proportional to 13.76, 20.52 and 13.01 is: 19.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.76 : 20.52 = 13.01 : x
  2. Step 2: Convert to fraction form
    13.76/20.52 = 13.01/x
  3. Step 3: Cross multiply
    13.76x = 20.52 × 13.01
  4. Step 4: Simplify right side
    13.76x = 267.02
  5. Step 5: Solve for x
    x = 267.02/13.76
  6. Step 6: Final answer
    x = 19.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.