Home / 13,721.76-18,936.84-7,753.28

Finding the Fourth Proportional to 13,721.76, 18,936.84 and 7,753.28

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Solution

The fourth proportional to 13,721.76, 18,936.84 and 7,753.28 is: 10,699.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.76 : 18,936.84 = 7,753.28 : x
  2. Step 2: Convert to fraction form
    13,721.76/18,936.84 = 7,753.28/x
  3. Step 3: Cross multiply
    13,721.76x = 18,936.84 × 7,753.28
  4. Step 4: Simplify right side
    13,721.76x = 146,822,622.84
  5. Step 5: Solve for x
    x = 146,822,622.84/13,721.76
  6. Step 6: Final answer
    x = 10,699.98

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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.