Home / 20,528.64-30,789.60-7,378.56

Finding the Fourth Proportional to 20,528.64, 30,789.60 and 7,378.56

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Solution

The fourth proportional to 20,528.64, 30,789.60 and 7,378.56 is: 11,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.64 : 30,789.60 = 7,378.56 : x
  2. Step 2: Convert to fraction form
    20,528.64/30,789.60 = 7,378.56/x
  3. Step 3: Cross multiply
    20,528.64x = 30,789.60 × 7,378.56
  4. Step 4: Simplify right side
    20,528.64x = 227,182,910.98
  5. Step 5: Solve for x
    x = 227,182,910.98/20,528.64
  6. Step 6: Final answer
    x = 11,066.63

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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.