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Finding the Fourth Proportional to 13,386.40, 20,101.20 and 10,103.20

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Solution

The fourth proportional to 13,386.40, 20,101.20 and 10,103.20 is: 15,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.40 : 20,101.20 = 10,103.20 : x
  2. Step 2: Convert to fraction form
    13,386.40/20,101.20 = 10,103.20/x
  3. Step 3: Cross multiply
    13,386.40x = 20,101.20 × 10,103.20
  4. Step 4: Simplify right side
    13,386.40x = 203,086,443.84
  5. Step 5: Solve for x
    x = 203,086,443.84/13,386.40
  6. Step 6: Final answer
    x = 15,171.10

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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.