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Finding the Fourth Proportional to 13,257.89, 18,295.88 and 7,289.94

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Solution

The fourth proportional to 13,257.89, 18,295.88 and 7,289.94 is: 10,060.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,257.89 : 18,295.88 = 7,289.94 : x
  2. Step 2: Convert to fraction form
    13,257.89/18,295.88 = 7,289.94/x
  3. Step 3: Cross multiply
    13,257.89x = 18,295.88 × 7,289.94
  4. Step 4: Simplify right side
    13,257.89x = 133,375,878.90
  5. Step 5: Solve for x
    x = 133,375,878.90/13,257.89
  6. Step 6: Final answer
    x = 10,060.12

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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.