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Finding the Fourth Proportional to 6,620.94, 9,128.60 and 4,849.47

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Solution

The fourth proportional to 6,620.94, 9,128.60 and 4,849.47 is: 6,686.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.94 : 9,128.60 = 4,849.47 : x
  2. Step 2: Convert to fraction form
    6,620.94/9,128.60 = 4,849.47/x
  3. Step 3: Cross multiply
    6,620.94x = 9,128.60 × 4,849.47
  4. Step 4: Simplify right side
    6,620.94x = 44,268,865.78
  5. Step 5: Solve for x
    x = 44,268,865.78/6,620.94
  6. Step 6: Final answer
    x = 6,686.19

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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.