Home / 21,269.51-31,916-8,786.63

Finding the Fourth Proportional to 21,269.51, 31,916 and 8,786.63

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Solution

The fourth proportional to 21,269.51, 31,916 and 8,786.63 is: 13,184.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.51 : 31,916 = 8,786.63 : x
  2. Step 2: Convert to fraction form
    21,269.51/31,916 = 8,786.63/x
  3. Step 3: Cross multiply
    21,269.51x = 31,916 × 8,786.63
  4. Step 4: Simplify right side
    21,269.51x = 280,434,083.08
  5. Step 5: Solve for x
    x = 280,434,083.08/21,269.51
  6. Step 6: Final answer
    x = 13,184.79

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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.