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Finding the Fourth Proportional to 55,756.64, 83,617.68 and 18,812

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Solution

The fourth proportional to 55,756.64, 83,617.68 and 18,812 is: 28,212.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,756.64 : 83,617.68 = 18,812 : x
  2. Step 2: Convert to fraction form
    55,756.64/83,617.68 = 18,812/x
  3. Step 3: Cross multiply
    55,756.64x = 83,617.68 × 18,812
  4. Step 4: Simplify right side
    55,756.64x = 1,573,015,796.16
  5. Step 5: Solve for x
    x = 1,573,015,796.16/55,756.64
  6. Step 6: Final answer
    x = 28,212.17

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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.