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Finding the Fourth Proportional to 8,460.66, 12,690.36 and 4,505.82

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Solution

The fourth proportional to 8,460.66, 12,690.36 and 4,505.82 is: 6,758.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.66 : 12,690.36 = 4,505.82 : x
  2. Step 2: Convert to fraction form
    8,460.66/12,690.36 = 4,505.82/x
  3. Step 3: Cross multiply
    8,460.66x = 12,690.36 × 4,505.82
  4. Step 4: Simplify right side
    8,460.66x = 57,180,477.90
  5. Step 5: Solve for x
    x = 57,180,477.90/8,460.66
  6. Step 6: Final answer
    x = 6,758.39

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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.