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Finding the Fourth Proportional to 38,606.55, 57,870.16 and 21,930.97

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Solution

The fourth proportional to 38,606.55, 57,870.16 and 21,930.97 is: 32,873.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,606.55 : 57,870.16 = 21,930.97 : x
  2. Step 2: Convert to fraction form
    38,606.55/57,870.16 = 21,930.97/x
  3. Step 3: Cross multiply
    38,606.55x = 57,870.16 × 21,930.97
  4. Step 4: Simplify right side
    38,606.55x = 1,269,148,742.86
  5. Step 5: Solve for x
    x = 1,269,148,742.86/38,606.55
  6. Step 6: Final answer
    x = 32,873.92

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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.