Home / 21,289.19-29,377.67-12,791.67

Finding the Fourth Proportional to 21,289.19, 29,377.67 and 12,791.67

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Solution

The fourth proportional to 21,289.19, 29,377.67 and 12,791.67 is: 17,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.19 : 29,377.67 = 12,791.67 : x
  2. Step 2: Convert to fraction form
    21,289.19/29,377.67 = 12,791.67/x
  3. Step 3: Cross multiply
    21,289.19x = 29,377.67 × 12,791.67
  4. Step 4: Simplify right side
    21,289.19x = 375,789,577.05
  5. Step 5: Solve for x
    x = 375,789,577.05/21,289.19
  6. Step 6: Final answer
    x = 17,651.66

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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.