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Finding the Fourth Proportional to 10,659.70, 15,990.90 and 5,722.56

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Solution

The fourth proportional to 10,659.70, 15,990.90 and 5,722.56 is: 8,584.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.70 : 15,990.90 = 5,722.56 : x
  2. Step 2: Convert to fraction form
    10,659.70/15,990.90 = 5,722.56/x
  3. Step 3: Cross multiply
    10,659.70x = 15,990.90 × 5,722.56
  4. Step 4: Simplify right side
    10,659.70x = 91,508,884.70
  5. Step 5: Solve for x
    x = 91,508,884.70/10,659.70
  6. Step 6: Final answer
    x = 8,584.56

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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.