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Finding the Fourth Proportional to 12,738.70, 17,580.51 and 7,074.54

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Solution

The fourth proportional to 12,738.70, 17,580.51 and 7,074.54 is: 9,763.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.70 : 17,580.51 = 7,074.54 : x
  2. Step 2: Convert to fraction form
    12,738.70/17,580.51 = 7,074.54/x
  3. Step 3: Cross multiply
    12,738.70x = 17,580.51 × 7,074.54
  4. Step 4: Simplify right side
    12,738.70x = 124,374,021.22
  5. Step 5: Solve for x
    x = 124,374,021.22/12,738.70
  6. Step 6: Final answer
    x = 9,763.48

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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.