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Finding the Fourth Proportional to 13,721.50, 18,936.48 and 7,753.02

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Solution

The fourth proportional to 13,721.50, 18,936.48 and 7,753.02 is: 10,699.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.50 : 18,936.48 = 7,753.02 : x
  2. Step 2: Convert to fraction form
    13,721.50/18,936.48 = 7,753.02/x
  3. Step 3: Cross multiply
    13,721.50x = 18,936.48 × 7,753.02
  4. Step 4: Simplify right side
    13,721.50x = 146,814,908.17
  5. Step 5: Solve for x
    x = 146,814,908.17/13,721.50
  6. Step 6: Final answer
    x = 10,699.63

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1.5x scale

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.