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Finding the Fourth Proportional to 18,709.88, 28,064.84 and 4,858.88

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Solution

The fourth proportional to 18,709.88, 28,064.84 and 4,858.88 is: 7,288.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.88 : 28,064.84 = 4,858.88 : x
  2. Step 2: Convert to fraction form
    18,709.88/28,064.84 = 4,858.88/x
  3. Step 3: Cross multiply
    18,709.88x = 28,064.84 × 4,858.88
  4. Step 4: Simplify right side
    18,709.88x = 136,363,525.16
  5. Step 5: Solve for x
    x = 136,363,525.16/18,709.88
  6. Step 6: Final answer
    x = 7,288.32

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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.