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Finding the Fourth Proportional to 6,477.86, 8,940.29 and 3,959.47

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Solution

The fourth proportional to 6,477.86, 8,940.29 and 3,959.47 is: 5,464.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,477.86 : 8,940.29 = 3,959.47 : x
  2. Step 2: Convert to fraction form
    6,477.86/8,940.29 = 3,959.47/x
  3. Step 3: Cross multiply
    6,477.86x = 8,940.29 × 3,959.47
  4. Step 4: Simplify right side
    6,477.86x = 35,398,810.05
  5. Step 5: Solve for x
    x = 35,398,810.05/6,477.86
  6. Step 6: Final answer
    x = 5,464.58

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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.