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Finding the Fourth Proportional to 7,259.78, 10,889.61 and 1,994.78

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Solution

The fourth proportional to 7,259.78, 10,889.61 and 1,994.78 is: 2,992.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,259.78 : 10,889.61 = 1,994.78 : x
  2. Step 2: Convert to fraction form
    7,259.78/10,889.61 = 1,994.78/x
  3. Step 3: Cross multiply
    7,259.78x = 10,889.61 × 1,994.78
  4. Step 4: Simplify right side
    7,259.78x = 21,722,311.81
  5. Step 5: Solve for x
    x = 21,722,311.81/7,259.78
  6. Step 6: Final answer
    x = 2,992.15

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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.