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Finding the Fourth Proportional to 13,653.34, 20,472.72 and 4,291.64

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Solution

The fourth proportional to 13,653.34, 20,472.72 and 4,291.64 is: 6,435.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,653.34 : 20,472.72 = 4,291.64 : x
  2. Step 2: Convert to fraction form
    13,653.34/20,472.72 = 4,291.64/x
  3. Step 3: Cross multiply
    13,653.34x = 20,472.72 × 4,291.64
  4. Step 4: Simplify right side
    13,653.34x = 87,861,544.06
  5. Step 5: Solve for x
    x = 87,861,544.06/13,653.34
  6. Step 6: Final answer
    x = 6,435.17

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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.