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Finding the Fourth Proportional to 13,713.26, 20,569.88 and 4,479.26

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Solution

The fourth proportional to 13,713.26, 20,569.88 and 4,479.26 is: 6,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,713.26 : 20,569.88 = 4,479.26 : x
  2. Step 2: Convert to fraction form
    13,713.26/20,569.88 = 4,479.26/x
  3. Step 3: Cross multiply
    13,713.26x = 20,569.88 × 4,479.26
  4. Step 4: Simplify right side
    13,713.26x = 92,137,840.69
  5. Step 5: Solve for x
    x = 92,137,840.69/13,713.26
  6. Step 6: Final answer
    x = 6,718.89

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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.