Home / 21,089.94-31,588.26-13,671.96

Finding the Fourth Proportional to 21,089.94, 31,588.26 and 13,671.96

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Solution

The fourth proportional to 21,089.94, 31,588.26 and 13,671.96 is: 20,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.94 : 31,588.26 = 13,671.96 : x
  2. Step 2: Convert to fraction form
    21,089.94/31,588.26 = 13,671.96/x
  3. Step 3: Cross multiply
    21,089.94x = 31,588.26 × 13,671.96
  4. Step 4: Simplify right side
    21,089.94x = 431,873,427.19
  5. Step 5: Solve for x
    x = 431,873,427.19/21,089.94
  6. Step 6: Final answer
    x = 20,477.70

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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.