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Finding the Fourth Proportional to 30,572.54, 45,858.81 and 20,181.86

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Solution

The fourth proportional to 30,572.54, 45,858.81 and 20,181.86 is: 30,272.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,572.54 : 45,858.81 = 20,181.86 : x
  2. Step 2: Convert to fraction form
    30,572.54/45,858.81 = 20,181.86/x
  3. Step 3: Cross multiply
    30,572.54x = 45,858.81 × 20,181.86
  4. Step 4: Simplify right side
    30,572.54x = 925,516,083.19
  5. Step 5: Solve for x
    x = 925,516,083.19/30,572.54
  6. Step 6: Final answer
    x = 30,272.79

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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.