Home / 15,453.66-21,318.20-9,778.84

Finding the Fourth Proportional to 15,453.66, 21,318.20 and 9,778.84

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Solution

The fourth proportional to 15,453.66, 21,318.20 and 9,778.84 is: 13,489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.66 : 21,318.20 = 9,778.84 : x
  2. Step 2: Convert to fraction form
    15,453.66/21,318.20 = 9,778.84/x
  3. Step 3: Cross multiply
    15,453.66x = 21,318.20 × 9,778.84
  4. Step 4: Simplify right side
    15,453.66x = 208,467,266.89
  5. Step 5: Solve for x
    x = 208,467,266.89/15,453.66
  6. Step 6: Final answer
    x = 13,489.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.