Home / 21,379.89-29,504.29-11,948.46

Finding the Fourth Proportional to 21,379.89, 29,504.29 and 11,948.46

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Solution

The fourth proportional to 21,379.89, 29,504.29 and 11,948.46 is: 16,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.89 : 29,504.29 = 11,948.46 : x
  2. Step 2: Convert to fraction form
    21,379.89/29,504.29 = 11,948.46/x
  3. Step 3: Cross multiply
    21,379.89x = 29,504.29 × 11,948.46
  4. Step 4: Simplify right side
    21,379.89x = 352,530,828.89
  5. Step 5: Solve for x
    x = 352,530,828.89/21,379.89
  6. Step 6: Final answer
    x = 16,488.90

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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.