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Finding the Fourth Proportional to 8,181.40, 11,290.53 and 4,455.40

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Solution

The fourth proportional to 8,181.40, 11,290.53 and 4,455.40 is: 6,148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,181.40 : 11,290.53 = 4,455.40 : x
  2. Step 2: Convert to fraction form
    8,181.40/11,290.53 = 4,455.40/x
  3. Step 3: Cross multiply
    8,181.40x = 11,290.53 × 4,455.40
  4. Step 4: Simplify right side
    8,181.40x = 50,303,827.36
  5. Step 5: Solve for x
    x = 50,303,827.36/8,181.40
  6. Step 6: Final answer
    x = 6,148.56

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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.