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Finding the Fourth Proportional to 7,621.44, 11,400.54 and 7,154.88

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Solution

The fourth proportional to 7,621.44, 11,400.54 and 7,154.88 is: 10,702.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.44 : 11,400.54 = 7,154.88 : x
  2. Step 2: Convert to fraction form
    7,621.44/11,400.54 = 7,154.88/x
  3. Step 3: Cross multiply
    7,621.44x = 11,400.54 × 7,154.88
  4. Step 4: Simplify right side
    7,621.44x = 81,569,495.64
  5. Step 5: Solve for x
    x = 81,569,495.64/7,621.44
  6. Step 6: Final answer
    x = 10,702.64

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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.