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Finding the Fourth Proportional to 18,558.64, 27,805.47 and 15,458.50

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Solution

The fourth proportional to 18,558.64, 27,805.47 and 15,458.50 is: 23,160.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,558.64 : 27,805.47 = 15,458.50 : x
  2. Step 2: Convert to fraction form
    18,558.64/27,805.47 = 15,458.50/x
  3. Step 3: Cross multiply
    18,558.64x = 27,805.47 × 15,458.50
  4. Step 4: Simplify right side
    18,558.64x = 429,830,858.00
  5. Step 5: Solve for x
    x = 429,830,858.00/18,558.64
  6. Step 6: Final answer
    x = 23,160.69

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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.