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Finding the Fourth Proportional to 6,963, 9,608.64 and 3,978.72

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Solution

The fourth proportional to 6,963, 9,608.64 and 3,978.72 is: 5,490.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,963 : 9,608.64 = 3,978.72 : x
  2. Step 2: Convert to fraction form
    6,963/9,608.64 = 3,978.72/x
  3. Step 3: Cross multiply
    6,963x = 9,608.64 × 3,978.72
  4. Step 4: Simplify right side
    6,963x = 38,230,088.14
  5. Step 5: Solve for x
    x = 38,230,088.14/6,963
  6. Step 6: Final answer
    x = 5,490.46

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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.