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Finding the Fourth Proportional to 60,355.81, 90,533.83 and 20,912.96

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Solution

The fourth proportional to 60,355.81, 90,533.83 and 20,912.96 is: 31,369.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,355.81 : 90,533.83 = 20,912.96 : x
  2. Step 2: Convert to fraction form
    60,355.81/90,533.83 = 20,912.96/x
  3. Step 3: Cross multiply
    60,355.81x = 90,533.83 × 20,912.96
  4. Step 4: Simplify right side
    60,355.81x = 1,893,330,365.44
  5. Step 5: Solve for x
    x = 1,893,330,365.44/60,355.81
  6. Step 6: Final answer
    x = 31,369.48

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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.