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Finding the Fourth Proportional to 8,917.45, 13,436.48 and 7,391.41

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Solution

The fourth proportional to 8,917.45, 13,436.48 and 7,391.41 is: 11,137.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.45 : 13,436.48 = 7,391.41 : x
  2. Step 2: Convert to fraction form
    8,917.45/13,436.48 = 7,391.41/x
  3. Step 3: Cross multiply
    8,917.45x = 13,436.48 × 7,391.41
  4. Step 4: Simplify right side
    8,917.45x = 99,314,514.16
  5. Step 5: Solve for x
    x = 99,314,514.16/8,917.45
  6. Step 6: Final answer
    x = 11,137.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.