Home / 21,977.30-30,328.26-11,905.68

Finding the Fourth Proportional to 21,977.30, 30,328.26 and 11,905.68

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Solution

The fourth proportional to 21,977.30, 30,328.26 and 11,905.68 is: 16,429.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.30 : 30,328.26 = 11,905.68 : x
  2. Step 2: Convert to fraction form
    21,977.30/30,328.26 = 11,905.68/x
  3. Step 3: Cross multiply
    21,977.30x = 30,328.26 × 11,905.68
  4. Step 4: Simplify right side
    21,977.30x = 361,078,558.52
  5. Step 5: Solve for x
    x = 361,078,558.52/21,977.30
  6. Step 6: Final answer
    x = 16,429.61

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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.