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Finding the Fourth Proportional to 13,496.40, 20,228.40 and 6,919.20

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Solution

The fourth proportional to 13,496.40, 20,228.40 and 6,919.20 is: 10,370.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,496.40 : 20,228.40 = 6,919.20 : x
  2. Step 2: Convert to fraction form
    13,496.40/20,228.40 = 6,919.20/x
  3. Step 3: Cross multiply
    13,496.40x = 20,228.40 × 6,919.20
  4. Step 4: Simplify right side
    13,496.40x = 139,964,345.28
  5. Step 5: Solve for x
    x = 139,964,345.28/13,496.40
  6. Step 6: Final answer
    x = 10,370.49

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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.