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Finding the Fourth Proportional to 8,485.30, 11,709.30 and 4,947.94

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Solution

The fourth proportional to 8,485.30, 11,709.30 and 4,947.94 is: 6,827.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.30 : 11,709.30 = 4,947.94 : x
  2. Step 2: Convert to fraction form
    8,485.30/11,709.30 = 4,947.94/x
  3. Step 3: Cross multiply
    8,485.30x = 11,709.30 × 4,947.94
  4. Step 4: Simplify right side
    8,485.30x = 57,936,913.84
  5. Step 5: Solve for x
    x = 57,936,913.84/8,485.30
  6. Step 6: Final answer
    x = 6,827.92

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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.