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Finding the Fourth Proportional to 18,487, 25,503.14 and 12,110.81

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Solution

The fourth proportional to 18,487, 25,503.14 and 12,110.81 is: 16,707.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487 : 25,503.14 = 12,110.81 : x
  2. Step 2: Convert to fraction form
    18,487/25,503.14 = 12,110.81/x
  3. Step 3: Cross multiply
    18,487x = 25,503.14 × 12,110.81
  4. Step 4: Simplify right side
    18,487x = 308,863,682.94
  5. Step 5: Solve for x
    x = 308,863,682.94/18,487
  6. Step 6: Final answer
    x = 16,707.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.