Home / 21,127.10-31,645.08-19,884.99

Finding the Fourth Proportional to 21,127.10, 31,645.08 and 19,884.99

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Solution

The fourth proportional to 21,127.10, 31,645.08 and 19,884.99 is: 29,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.10 : 31,645.08 = 19,884.99 : x
  2. Step 2: Convert to fraction form
    21,127.10/31,645.08 = 19,884.99/x
  3. Step 3: Cross multiply
    21,127.10x = 31,645.08 × 19,884.99
  4. Step 4: Simplify right side
    21,127.10x = 629,262,140.44
  5. Step 5: Solve for x
    x = 629,262,140.44/21,127.10
  6. Step 6: Final answer
    x = 29,784.60

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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.