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Finding the Fourth Proportional to 10,890.98, 15,038.03 and 8,369.09

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Solution

The fourth proportional to 10,890.98, 15,038.03 and 8,369.09 is: 11,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.98 : 15,038.03 = 8,369.09 : x
  2. Step 2: Convert to fraction form
    10,890.98/15,038.03 = 8,369.09/x
  3. Step 3: Cross multiply
    10,890.98x = 15,038.03 × 8,369.09
  4. Step 4: Simplify right side
    10,890.98x = 125,854,584.65
  5. Step 5: Solve for x
    x = 125,854,584.65/10,890.98
  6. Step 6: Final answer
    x = 11,555.85

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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.