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Finding the Fourth Proportional to 7,686.56, 10,609.80 and 4,816.84

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Solution

The fourth proportional to 7,686.56, 10,609.80 and 4,816.84 is: 6,648.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,686.56 : 10,609.80 = 4,816.84 : x
  2. Step 2: Convert to fraction form
    7,686.56/10,609.80 = 4,816.84/x
  3. Step 3: Cross multiply
    7,686.56x = 10,609.80 × 4,816.84
  4. Step 4: Simplify right side
    7,686.56x = 51,105,709.03
  5. Step 5: Solve for x
    x = 51,105,709.03/7,686.56
  6. Step 6: Final answer
    x = 6,648.71

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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.