Home / 21,212.20-31,977.07-19,784.98

Finding the Fourth Proportional to 21,212.20, 31,977.07 and 19,784.98

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Solution

The fourth proportional to 21,212.20, 31,977.07 and 19,784.98 is: 29,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.20 : 31,977.07 = 19,784.98 : x
  2. Step 2: Convert to fraction form
    21,212.20/31,977.07 = 19,784.98/x
  3. Step 3: Cross multiply
    21,212.20x = 31,977.07 × 19,784.98
  4. Step 4: Simplify right side
    21,212.20x = 632,665,690.41
  5. Step 5: Solve for x
    x = 632,665,690.41/21,212.20
  6. Step 6: Final answer
    x = 29,825.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.