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Finding the Fourth Proportional to 9,907.66, 13,670.33 and 6,721.39

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Solution

The fourth proportional to 9,907.66, 13,670.33 and 6,721.39 is: 9,273.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,907.66 : 13,670.33 = 6,721.39 : x
  2. Step 2: Convert to fraction form
    9,907.66/13,670.33 = 6,721.39/x
  3. Step 3: Cross multiply
    9,907.66x = 13,670.33 × 6,721.39
  4. Step 4: Simplify right side
    9,907.66x = 91,883,585.75
  5. Step 5: Solve for x
    x = 91,883,585.75/9,907.66
  6. Step 6: Final answer
    x = 9,273.99

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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.