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Finding the Fourth Proportional to 18,657.53, 27,985.83 and 7,561.23

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Solution

The fourth proportional to 18,657.53, 27,985.83 and 7,561.23 is: 11,341.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.53 : 27,985.83 = 7,561.23 : x
  2. Step 2: Convert to fraction form
    18,657.53/27,985.83 = 7,561.23/x
  3. Step 3: Cross multiply
    18,657.53x = 27,985.83 × 7,561.23
  4. Step 4: Simplify right side
    18,657.53x = 211,607,297.37
  5. Step 5: Solve for x
    x = 211,607,297.37/18,657.53
  6. Step 6: Final answer
    x = 11,341.66

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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.