Home / 21,238.58-29,310.00-11,679.20

Finding the Fourth Proportional to 21,238.58, 29,310.00 and 11,679.20

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Solution

The fourth proportional to 21,238.58, 29,310.00 and 11,679.20 is: 16,117.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.58 : 29,310.00 = 11,679.20 : x
  2. Step 2: Convert to fraction form
    21,238.58/29,310.00 = 11,679.20/x
  3. Step 3: Cross multiply
    21,238.58x = 29,310.00 × 11,679.20
  4. Step 4: Simplify right side
    21,238.58x = 342,317,238.51
  5. Step 5: Solve for x
    x = 342,317,238.51/21,238.58
  6. Step 6: Final answer
    x = 16,117.71

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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.