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Finding the Fourth Proportional to 11,998.31, 16,554.35 and 7,749.55

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Solution

The fourth proportional to 11,998.31, 16,554.35 and 7,749.55 is: 10,692.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.31 : 16,554.35 = 7,749.55 : x
  2. Step 2: Convert to fraction form
    11,998.31/16,554.35 = 7,749.55/x
  3. Step 3: Cross multiply
    11,998.31x = 16,554.35 × 7,749.55
  4. Step 4: Simplify right side
    11,998.31x = 128,288,763.04
  5. Step 5: Solve for x
    x = 128,288,763.04/11,998.31
  6. Step 6: Final answer
    x = 10,692.24

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Double scale
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Similar ratio
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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.