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Finding the Fourth Proportional to 7,760.50, 10,709.40 and 4,223.65

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Solution

The fourth proportional to 7,760.50, 10,709.40 and 4,223.65 is: 5,828.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,760.50 : 10,709.40 = 4,223.65 : x
  2. Step 2: Convert to fraction form
    7,760.50/10,709.40 = 4,223.65/x
  3. Step 3: Cross multiply
    7,760.50x = 10,709.40 × 4,223.65
  4. Step 4: Simplify right side
    7,760.50x = 45,232,757.31
  5. Step 5: Solve for x
    x = 45,232,757.31/7,760.50
  6. Step 6: Final answer
    x = 5,828.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.