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Finding the Fourth Proportional to 7,752.70, 11,628.93 and 1,909.31

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Solution

The fourth proportional to 7,752.70, 11,628.93 and 1,909.31 is: 2,863.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,752.70 : 11,628.93 = 1,909.31 : x
  2. Step 2: Convert to fraction form
    7,752.70/11,628.93 = 1,909.31/x
  3. Step 3: Cross multiply
    7,752.70x = 11,628.93 × 1,909.31
  4. Step 4: Simplify right side
    7,752.70x = 22,203,232.34
  5. Step 5: Solve for x
    x = 22,203,232.34/7,752.70
  6. Step 6: Final answer
    x = 2,863.94

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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.