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Finding the Fourth Proportional to 13,759.21, 20,642.31 and 6,368.98

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Solution

The fourth proportional to 13,759.21, 20,642.31 and 6,368.98 is: 9,555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.21 : 20,642.31 = 6,368.98 : x
  2. Step 2: Convert to fraction form
    13,759.21/20,642.31 = 6,368.98/x
  3. Step 3: Cross multiply
    13,759.21x = 20,642.31 × 6,368.98
  4. Step 4: Simplify right side
    13,759.21x = 131,470,459.54
  5. Step 5: Solve for x
    x = 131,470,459.54/13,759.21
  6. Step 6: Final answer
    x = 9,555.09

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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.