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Finding the Fourth Proportional to 6,629.52, 9,148.74 and 3,978.51

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Solution

The fourth proportional to 6,629.52, 9,148.74 and 3,978.51 is: 5,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,629.52 : 9,148.74 = 3,978.51 : x
  2. Step 2: Convert to fraction form
    6,629.52/9,148.74 = 3,978.51/x
  3. Step 3: Cross multiply
    6,629.52x = 9,148.74 × 3,978.51
  4. Step 4: Simplify right side
    6,629.52x = 36,398,353.58
  5. Step 5: Solve for x
    x = 36,398,353.58/6,629.52
  6. Step 6: Final answer
    x = 5,490.35

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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.