Home / 21,211.72-29,260.38-19,709.98

Finding the Fourth Proportional to 21,211.72, 29,260.38 and 19,709.98

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Solution

The fourth proportional to 21,211.72, 29,260.38 and 19,709.98 is: 27,188.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.72 : 29,260.38 = 19,709.98 : x
  2. Step 2: Convert to fraction form
    21,211.72/29,260.38 = 19,709.98/x
  3. Step 3: Cross multiply
    21,211.72x = 29,260.38 × 19,709.98
  4. Step 4: Simplify right side
    21,211.72x = 576,721,504.59
  5. Step 5: Solve for x
    x = 576,721,504.59/21,211.72
  6. Step 6: Final answer
    x = 27,188.81

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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.