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Finding the Fourth Proportional to 6,903.20, 9,526.80 and 3,917.92

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Solution

The fourth proportional to 6,903.20, 9,526.80 and 3,917.92 is: 5,406.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,903.20 : 9,526.80 = 3,917.92 : x
  2. Step 2: Convert to fraction form
    6,903.20/9,526.80 = 3,917.92/x
  3. Step 3: Cross multiply
    6,903.20x = 9,526.80 × 3,917.92
  4. Step 4: Simplify right side
    6,903.20x = 37,325,240.26
  5. Step 5: Solve for x
    x = 37,325,240.26/6,903.20
  6. Step 6: Final answer
    x = 5,406.95

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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.