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Finding the Fourth Proportional to 20,160.56, 30,240.72 and 7,848.56

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Solution

The fourth proportional to 20,160.56, 30,240.72 and 7,848.56 is: 11,772.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.56 : 30,240.72 = 7,848.56 : x
  2. Step 2: Convert to fraction form
    20,160.56/30,240.72 = 7,848.56/x
  3. Step 3: Cross multiply
    20,160.56x = 30,240.72 × 7,848.56
  4. Step 4: Simplify right side
    20,160.56x = 237,346,105.36
  5. Step 5: Solve for x
    x = 237,346,105.36/20,160.56
  6. Step 6: Final answer
    x = 11,772.79

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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.