Home / 13,139.04-19,662.30-8,211

Finding the Fourth Proportional to 13,139.04, 19,662.30 and 8,211

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Solution

The fourth proportional to 13,139.04, 19,662.30 and 8,211 is: 12,287.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.04 : 19,662.30 = 8,211 : x
  2. Step 2: Convert to fraction form
    13,139.04/19,662.30 = 8,211/x
  3. Step 3: Cross multiply
    13,139.04x = 19,662.30 × 8,211
  4. Step 4: Simplify right side
    13,139.04x = 161,447,145.30
  5. Step 5: Solve for x
    x = 161,447,145.30/13,139.04
  6. Step 6: Final answer
    x = 12,287.59

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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.