Home / 21,173.99-31,764.43-8,690.66

Finding the Fourth Proportional to 21,173.99, 31,764.43 and 8,690.66

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Solution

The fourth proportional to 21,173.99, 31,764.43 and 8,690.66 is: 13,037.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.99 : 31,764.43 = 8,690.66 : x
  2. Step 2: Convert to fraction form
    21,173.99/31,764.43 = 8,690.66/x
  3. Step 3: Cross multiply
    21,173.99x = 31,764.43 × 8,690.66
  4. Step 4: Simplify right side
    21,173.99x = 276,053,832.38
  5. Step 5: Solve for x
    x = 276,053,832.38/21,173.99
  6. Step 6: Final answer
    x = 13,037.41

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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.