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Finding the Fourth Proportional to 6,138.95, 8,471.45 and 3,485.99

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Solution

The fourth proportional to 6,138.95, 8,471.45 and 3,485.99 is: 4,810.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138.95 : 8,471.45 = 3,485.99 : x
  2. Step 2: Convert to fraction form
    6,138.95/8,471.45 = 3,485.99/x
  3. Step 3: Cross multiply
    6,138.95x = 8,471.45 × 3,485.99
  4. Step 4: Simplify right side
    6,138.95x = 29,531,419.88
  5. Step 5: Solve for x
    x = 29,531,419.88/6,138.95
  6. Step 6: Final answer
    x = 4,810.50

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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.