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Finding the Fourth Proportional to 13,619.28, 20,423.07 and 6,228.42

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Solution

The fourth proportional to 13,619.28, 20,423.07 and 6,228.42 is: 9,339.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.28 : 20,423.07 = 6,228.42 : x
  2. Step 2: Convert to fraction form
    13,619.28/20,423.07 = 6,228.42/x
  3. Step 3: Cross multiply
    13,619.28x = 20,423.07 × 6,228.42
  4. Step 4: Simplify right side
    13,619.28x = 127,203,457.65
  5. Step 5: Solve for x
    x = 127,203,457.65/13,619.28
  6. Step 6: Final answer
    x = 9,339.95

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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.