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Finding the Fourth Proportional to 18,698.00, 28,005.80 and 15,455.48

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Solution

The fourth proportional to 18,698.00, 28,005.80 and 15,455.48 is: 23,149.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.00 : 28,005.80 = 15,455.48 : x
  2. Step 2: Convert to fraction form
    18,698.00/28,005.80 = 15,455.48/x
  3. Step 3: Cross multiply
    18,698.00x = 28,005.80 × 15,455.48
  4. Step 4: Simplify right side
    18,698.00x = 432,843,074.52
  5. Step 5: Solve for x
    x = 432,843,074.52/18,698.00
  6. Step 6: Final answer
    x = 23,149.16

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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.