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Finding the Fourth Proportional to 6,921.62, 9,552.54 and 4,089.91

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Solution

The fourth proportional to 6,921.62, 9,552.54 and 4,089.91 is: 5,644.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.62 : 9,552.54 = 4,089.91 : x
  2. Step 2: Convert to fraction form
    6,921.62/9,552.54 = 4,089.91/x
  3. Step 3: Cross multiply
    6,921.62x = 9,552.54 × 4,089.91
  4. Step 4: Simplify right side
    6,921.62x = 39,069,040.81
  5. Step 5: Solve for x
    x = 39,069,040.81/6,921.62
  6. Step 6: Final answer
    x = 5,644.49

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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.