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Finding the Fourth Proportional to 6,139.69, 8,470.54 and 3,485.57

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Solution

The fourth proportional to 6,139.69, 8,470.54 and 3,485.57 is: 4,808.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.69 : 8,470.54 = 3,485.57 : x
  2. Step 2: Convert to fraction form
    6,139.69/8,470.54 = 3,485.57/x
  3. Step 3: Cross multiply
    6,139.69x = 8,470.54 × 3,485.57
  4. Step 4: Simplify right side
    6,139.69x = 29,524,622.11
  5. Step 5: Solve for x
    x = 29,524,622.11/6,139.69
  6. Step 6: Final answer
    x = 4,808.81

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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.