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Finding the Fourth Proportional to 6,415.57, 8,851.03 and 3,896.79

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Solution

The fourth proportional to 6,415.57, 8,851.03 and 3,896.79 is: 5,376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,415.57 : 8,851.03 = 3,896.79 : x
  2. Step 2: Convert to fraction form
    6,415.57/8,851.03 = 3,896.79/x
  3. Step 3: Cross multiply
    6,415.57x = 8,851.03 × 3,896.79
  4. Step 4: Simplify right side
    6,415.57x = 34,490,605.19
  5. Step 5: Solve for x
    x = 34,490,605.19/6,415.57
  6. Step 6: Final answer
    x = 5,376.08

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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.