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Finding the Fourth Proportional to 6,143.81, 8,478.86 and 3,455.28

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Solution

The fourth proportional to 6,143.81, 8,478.86 and 3,455.28 is: 4,768.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,143.81 : 8,478.86 = 3,455.28 : x
  2. Step 2: Convert to fraction form
    6,143.81/8,478.86 = 3,455.28/x
  3. Step 3: Cross multiply
    6,143.81x = 8,478.86 × 3,455.28
  4. Step 4: Simplify right side
    6,143.81x = 29,296,818.10
  5. Step 5: Solve for x
    x = 29,296,818.10/6,143.81
  6. Step 6: Final answer
    x = 4,768.51

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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.