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Finding the Fourth Proportional to 9,921.80, 13,692.73 and 6,558.73

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Solution

The fourth proportional to 9,921.80, 13,692.73 and 6,558.73 is: 9,051.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.80 : 13,692.73 = 6,558.73 : x
  2. Step 2: Convert to fraction form
    9,921.80/13,692.73 = 6,558.73/x
  3. Step 3: Cross multiply
    9,921.80x = 13,692.73 × 6,558.73
  4. Step 4: Simplify right side
    9,921.80x = 89,806,919.03
  5. Step 5: Solve for x
    x = 89,806,919.03/9,921.80
  6. Step 6: Final answer
    x = 9,051.47

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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.