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Finding the Fourth Proportional to 57,057.60, 85,579.92 and 21,994.32

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Solution

The fourth proportional to 57,057.60, 85,579.92 and 21,994.32 is: 32,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,057.60 : 85,579.92 = 21,994.32 : x
  2. Step 2: Convert to fraction form
    57,057.60/85,579.92 = 21,994.32/x
  3. Step 3: Cross multiply
    57,057.60x = 85,579.92 × 21,994.32
  4. Step 4: Simplify right side
    57,057.60x = 1,882,272,146.05
  5. Step 5: Solve for x
    x = 1,882,272,146.05/57,057.60
  6. Step 6: Final answer
    x = 32,988.98

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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.