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Finding the Fourth Proportional to 7,621.79, 11,437.79 and 2,691.45

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Solution

The fourth proportional to 7,621.79, 11,437.79 and 2,691.45 is: 4,038.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.79 : 11,437.79 = 2,691.45 : x
  2. Step 2: Convert to fraction form
    7,621.79/11,437.79 = 2,691.45/x
  3. Step 3: Cross multiply
    7,621.79x = 11,437.79 × 2,691.45
  4. Step 4: Simplify right side
    7,621.79x = 30,784,226.44
  5. Step 5: Solve for x
    x = 30,784,226.44/7,621.79
  6. Step 6: Final answer
    x = 4,038.98

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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.