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Finding the Fourth Proportional to 20,491.24, 30,746.88 and 7,344.64

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Solution

The fourth proportional to 20,491.24, 30,746.88 and 7,344.64 is: 11,020.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.24 : 30,746.88 = 7,344.64 : x
  2. Step 2: Convert to fraction form
    20,491.24/30,746.88 = 7,344.64/x
  3. Step 3: Cross multiply
    20,491.24x = 30,746.88 × 7,344.64
  4. Step 4: Simplify right side
    20,491.24x = 225,824,764.72
  5. Step 5: Solve for x
    x = 225,824,764.72/20,491.24
  6. Step 6: Final answer
    x = 11,020.55

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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.