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Finding the Fourth Proportional to 6,721.84, 9,315.36 and 6,627.84

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Solution

The fourth proportional to 6,721.84, 9,315.36 and 6,627.84 is: 9,185.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,721.84 : 9,315.36 = 6,627.84 : x
  2. Step 2: Convert to fraction form
    6,721.84/9,315.36 = 6,627.84/x
  3. Step 3: Cross multiply
    6,721.84x = 9,315.36 × 6,627.84
  4. Step 4: Simplify right side
    6,721.84x = 61,740,715.62
  5. Step 5: Solve for x
    x = 61,740,715.62/6,721.84
  6. Step 6: Final answer
    x = 9,185.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.