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Finding the Fourth Proportional to 8,580.65, 12,878.36 and 4,890.29

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Solution

The fourth proportional to 8,580.65, 12,878.36 and 4,890.29 is: 7,339.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.65 : 12,878.36 = 4,890.29 : x
  2. Step 2: Convert to fraction form
    8,580.65/12,878.36 = 4,890.29/x
  3. Step 3: Cross multiply
    8,580.65x = 12,878.36 × 4,890.29
  4. Step 4: Simplify right side
    8,580.65x = 62,978,915.12
  5. Step 5: Solve for x
    x = 62,978,915.12/8,580.65
  6. Step 6: Final answer
    x = 7,339.64

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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.