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Finding the Fourth Proportional to 18,713.60, 27,937.60 and 16,640

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Solution

The fourth proportional to 18,713.60, 27,937.60 and 16,640 is: 24,841.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.60 : 27,937.60 = 16,640 : x
  2. Step 2: Convert to fraction form
    18,713.60/27,937.60 = 16,640/x
  3. Step 3: Cross multiply
    18,713.60x = 27,937.60 × 16,640
  4. Step 4: Simplify right side
    18,713.60x = 464,881,664
  5. Step 5: Solve for x
    x = 464,881,664/18,713.60
  6. Step 6: Final answer
    x = 24,841.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.