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Finding the Fourth Proportional to 57,015.40, 85,462.62 and 21,939.88

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Solution

The fourth proportional to 57,015.40, 85,462.62 and 21,939.88 is: 32,886.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,015.40 : 85,462.62 = 21,939.88 : x
  2. Step 2: Convert to fraction form
    57,015.40/85,462.62 = 21,939.88/x
  3. Step 3: Cross multiply
    57,015.40x = 85,462.62 × 21,939.88
  4. Step 4: Simplify right side
    57,015.40x = 1,875,039,627.29
  5. Step 5: Solve for x
    x = 1,875,039,627.29/57,015.40
  6. Step 6: Final answer
    x = 32,886.55

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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.