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Finding the Fourth Proportional to 55,638.64, 83,440.68 and 18,694

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Solution

The fourth proportional to 55,638.64, 83,440.68 and 18,694 is: 28,035.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,638.64 : 83,440.68 = 18,694 : x
  2. Step 2: Convert to fraction form
    55,638.64/83,440.68 = 18,694/x
  3. Step 3: Cross multiply
    55,638.64x = 83,440.68 × 18,694
  4. Step 4: Simplify right side
    55,638.64x = 1,559,840,071.92
  5. Step 5: Solve for x
    x = 1,559,840,071.92/55,638.64
  6. Step 6: Final answer
    x = 28,035.19

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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.