Home / 21,038.94-28,999.62-19,857.96

Finding the Fourth Proportional to 21,038.94, 28,999.62 and 19,857.96

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Solution

The fourth proportional to 21,038.94, 28,999.62 and 19,857.96 is: 27,371.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.94 : 28,999.62 = 19,857.96 : x
  2. Step 2: Convert to fraction form
    21,038.94/28,999.62 = 19,857.96/x
  3. Step 3: Cross multiply
    21,038.94x = 28,999.62 × 19,857.96
  4. Step 4: Simplify right side
    21,038.94x = 575,873,293.98
  5. Step 5: Solve for x
    x = 575,873,293.98/21,038.94
  6. Step 6: Final answer
    x = 27,371.78

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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.