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Finding the Fourth Proportional to 12,126.77, 16,736.99 and 7,021.54

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Solution

The fourth proportional to 12,126.77, 16,736.99 and 7,021.54 is: 9,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.77 : 16,736.99 = 7,021.54 : x
  2. Step 2: Convert to fraction form
    12,126.77/16,736.99 = 7,021.54/x
  3. Step 3: Cross multiply
    12,126.77x = 16,736.99 × 7,021.54
  4. Step 4: Simplify right side
    12,126.77x = 117,519,444.76
  5. Step 5: Solve for x
    x = 117,519,444.76/12,126.77
  6. Step 6: Final answer
    x = 9,690.91

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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.