Home / 13,721.57-18,936.14-7,753.12

Finding the Fourth Proportional to 13,721.57, 18,936.14 and 7,753.12

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Solution

The fourth proportional to 13,721.57, 18,936.14 and 7,753.12 is: 10,699.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.57 : 18,936.14 = 7,753.12 : x
  2. Step 2: Convert to fraction form
    13,721.57/18,936.14 = 7,753.12/x
  3. Step 3: Cross multiply
    13,721.57x = 18,936.14 × 7,753.12
  4. Step 4: Simplify right side
    13,721.57x = 146,814,185.14
  5. Step 5: Solve for x
    x = 146,814,185.14/13,721.57
  6. Step 6: Final answer
    x = 10,699.52

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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.