Home / 13,287.84-19,940.40-6,721.44

Finding the Fourth Proportional to 13,287.84, 19,940.40 and 6,721.44

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Solution

The fourth proportional to 13,287.84, 19,940.40 and 6,721.44 is: 10,086.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.84 : 19,940.40 = 6,721.44 : x
  2. Step 2: Convert to fraction form
    13,287.84/19,940.40 = 6,721.44/x
  3. Step 3: Cross multiply
    13,287.84x = 19,940.40 × 6,721.44
  4. Step 4: Simplify right side
    13,287.84x = 134,028,202.18
  5. Step 5: Solve for x
    x = 134,028,202.18/13,287.84
  6. Step 6: Final answer
    x = 10,086.53

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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.