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Finding the Fourth Proportional to 8,427.66, 12,637.59 and 4,918.70

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Solution

The fourth proportional to 8,427.66, 12,637.59 and 4,918.70 is: 7,375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.66 : 12,637.59 = 4,918.70 : x
  2. Step 2: Convert to fraction form
    8,427.66/12,637.59 = 4,918.70/x
  3. Step 3: Cross multiply
    8,427.66x = 12,637.59 × 4,918.70
  4. Step 4: Simplify right side
    8,427.66x = 62,160,450.75
  5. Step 5: Solve for x
    x = 62,160,450.75/8,427.66
  6. Step 6: Final answer
    x = 7,375.77

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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.