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Finding the Fourth Proportional to 16,921.79, 23,351.73 and 9,368.12

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Solution

The fourth proportional to 16,921.79, 23,351.73 and 9,368.12 is: 12,927.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,921.79 : 23,351.73 = 9,368.12 : x
  2. Step 2: Convert to fraction form
    16,921.79/23,351.73 = 9,368.12/x
  3. Step 3: Cross multiply
    16,921.79x = 23,351.73 × 9,368.12
  4. Step 4: Simplify right side
    16,921.79x = 218,761,692.09
  5. Step 5: Solve for x
    x = 218,761,692.09/16,921.79
  6. Step 6: Final answer
    x = 12,927.81

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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.