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Finding the Fourth Proportional to 8,455.56, 12,681.72 and 3,260.76

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Solution

The fourth proportional to 8,455.56, 12,681.72 and 3,260.76 is: 4,890.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.56 : 12,681.72 = 3,260.76 : x
  2. Step 2: Convert to fraction form
    8,455.56/12,681.72 = 3,260.76/x
  3. Step 3: Cross multiply
    8,455.56x = 12,681.72 × 3,260.76
  4. Step 4: Simplify right side
    8,455.56x = 41,352,045.31
  5. Step 5: Solve for x
    x = 41,352,045.31/8,455.56
  6. Step 6: Final answer
    x = 4,890.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.