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Finding the Fourth Proportional to 18,005.44, 26,985.12 and 15,917.44

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Solution

The fourth proportional to 18,005.44, 26,985.12 and 15,917.44 is: 23,855.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,005.44 : 26,985.12 = 15,917.44 : x
  2. Step 2: Convert to fraction form
    18,005.44/26,985.12 = 15,917.44/x
  3. Step 3: Cross multiply
    18,005.44x = 26,985.12 × 15,917.44
  4. Step 4: Simplify right side
    18,005.44x = 429,534,028.49
  5. Step 5: Solve for x
    x = 429,534,028.49/18,005.44
  6. Step 6: Final answer
    x = 23,855.79

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1.5x scale

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.