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Finding the Fourth Proportional to 18,686.43, 28,029.74 and 4,835.43

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Solution

The fourth proportional to 18,686.43, 28,029.74 and 4,835.43 is: 7,253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.43 : 28,029.74 = 4,835.43 : x
  2. Step 2: Convert to fraction form
    18,686.43/28,029.74 = 4,835.43/x
  3. Step 3: Cross multiply
    18,686.43x = 28,029.74 × 4,835.43
  4. Step 4: Simplify right side
    18,686.43x = 135,535,727.06
  5. Step 5: Solve for x
    x = 135,535,727.06/18,686.43
  6. Step 6: Final answer
    x = 7,253.16

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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.