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Finding the Fourth Proportional to 6,448.06, 8,901.12 and 3,930.99

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Solution

The fourth proportional to 6,448.06, 8,901.12 and 3,930.99 is: 5,426.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,448.06 : 8,901.12 = 3,930.99 : x
  2. Step 2: Convert to fraction form
    6,448.06/8,901.12 = 3,930.99/x
  3. Step 3: Cross multiply
    6,448.06x = 8,901.12 × 3,930.99
  4. Step 4: Simplify right side
    6,448.06x = 34,990,213.71
  5. Step 5: Solve for x
    x = 34,990,213.71/6,448.06
  6. Step 6: Final answer
    x = 5,426.47

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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.