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Finding the Fourth Proportional to 8,485.86, 11,708.37 and 4,947.78

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Solution

The fourth proportional to 8,485.86, 11,708.37 and 4,947.78 is: 6,826.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.86 : 11,708.37 = 4,947.78 : x
  2. Step 2: Convert to fraction form
    8,485.86/11,708.37 = 4,947.78/x
  3. Step 3: Cross multiply
    8,485.86x = 11,708.37 × 4,947.78
  4. Step 4: Simplify right side
    8,485.86x = 57,930,438.92
  5. Step 5: Solve for x
    x = 57,930,438.92/8,485.86
  6. Step 6: Final answer
    x = 6,826.70

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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.