Home / 21,289.45-29,379.96-11,858.17

Finding the Fourth Proportional to 21,289.45, 29,379.96 and 11,858.17

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Solution

The fourth proportional to 21,289.45, 29,379.96 and 11,858.17 is: 16,364.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.45 : 29,379.96 = 11,858.17 : x
  2. Step 2: Convert to fraction form
    21,289.45/29,379.96 = 11,858.17/x
  3. Step 3: Cross multiply
    21,289.45x = 29,379.96 × 11,858.17
  4. Step 4: Simplify right side
    21,289.45x = 348,392,560.27
  5. Step 5: Solve for x
    x = 348,392,560.27/21,289.45
  6. Step 6: Final answer
    x = 16,364.56

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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.