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Finding the Fourth Proportional to 18,663.68, 27,937.60 and 13,955.92

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Solution

The fourth proportional to 18,663.68, 27,937.60 and 13,955.92 is: 20,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.68 : 27,937.60 = 13,955.92 : x
  2. Step 2: Convert to fraction form
    18,663.68/27,937.60 = 13,955.92/x
  3. Step 3: Cross multiply
    18,663.68x = 27,937.60 × 13,955.92
  4. Step 4: Simplify right side
    18,663.68x = 389,894,910.59
  5. Step 5: Solve for x
    x = 389,894,910.59/18,663.68
  6. Step 6: Final answer
    x = 20,890.57

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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.