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Finding the Fourth Proportional to 14,382.44, 21,573.28 and 7,721.20

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Solution

The fourth proportional to 14,382.44, 21,573.28 and 7,721.20 is: 11,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,382.44 : 21,573.28 = 7,721.20 : x
  2. Step 2: Convert to fraction form
    14,382.44/21,573.28 = 7,721.20/x
  3. Step 3: Cross multiply
    14,382.44x = 21,573.28 × 7,721.20
  4. Step 4: Simplify right side
    14,382.44x = 166,571,609.54
  5. Step 5: Solve for x
    x = 166,571,609.54/14,382.44
  6. Step 6: Final answer
    x = 11,581.60

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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.