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Finding the Fourth Proportional to 12,958.95, 19,438.74 and 9,692.79

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Solution

The fourth proportional to 12,958.95, 19,438.74 and 9,692.79 is: 14,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.95 : 19,438.74 = 9,692.79 : x
  2. Step 2: Convert to fraction form
    12,958.95/19,438.74 = 9,692.79/x
  3. Step 3: Cross multiply
    12,958.95x = 19,438.74 × 9,692.79
  4. Step 4: Simplify right side
    12,958.95x = 188,415,624.68
  5. Step 5: Solve for x
    x = 188,415,624.68/12,958.95
  6. Step 6: Final answer
    x = 14,539.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.