Home / 21,977.09-30,328.53-11,905.53

Finding the Fourth Proportional to 21,977.09, 30,328.53 and 11,905.53

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Solution

The fourth proportional to 21,977.09, 30,328.53 and 11,905.53 is: 16,429.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.09 : 30,328.53 = 11,905.53 : x
  2. Step 2: Convert to fraction form
    21,977.09/30,328.53 = 11,905.53/x
  3. Step 3: Cross multiply
    21,977.09x = 30,328.53 × 11,905.53
  4. Step 4: Simplify right side
    21,977.09x = 361,077,223.77
  5. Step 5: Solve for x
    x = 361,077,223.77/21,977.09
  6. Step 6: Final answer
    x = 16,429.71

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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.