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Finding the Fourth Proportional to 7,169.94, 9,897.54 and 6,721.56

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Solution

The fourth proportional to 7,169.94, 9,897.54 and 6,721.56 is: 9,278.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,169.94 : 9,897.54 = 6,721.56 : x
  2. Step 2: Convert to fraction form
    7,169.94/9,897.54 = 6,721.56/x
  3. Step 3: Cross multiply
    7,169.94x = 9,897.54 × 6,721.56
  4. Step 4: Simplify right side
    7,169.94x = 66,526,908.96
  5. Step 5: Solve for x
    x = 66,526,908.96/7,169.94
  6. Step 6: Final answer
    x = 9,278.59

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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.