Home / 21,137.99-29,171.09-11,707.43

Finding the Fourth Proportional to 21,137.99, 29,171.09 and 11,707.43

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Solution

The fourth proportional to 21,137.99, 29,171.09 and 11,707.43 is: 16,156.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.99 : 29,171.09 = 11,707.43 : x
  2. Step 2: Convert to fraction form
    21,137.99/29,171.09 = 11,707.43/x
  3. Step 3: Cross multiply
    21,137.99x = 29,171.09 × 11,707.43
  4. Step 4: Simplify right side
    21,137.99x = 341,518,435.66
  5. Step 5: Solve for x
    x = 341,518,435.66/21,137.99
  6. Step 6: Final answer
    x = 16,156.62

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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.