Home / 21,976.93-30,328.31-11,905.37

Finding the Fourth Proportional to 21,976.93, 30,328.31 and 11,905.37

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Solution

The fourth proportional to 21,976.93, 30,328.31 and 11,905.37 is: 16,429.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.93 : 30,328.31 = 11,905.37 : x
  2. Step 2: Convert to fraction form
    21,976.93/30,328.31 = 11,905.37/x
  3. Step 3: Cross multiply
    21,976.93x = 30,328.31 × 11,905.37
  4. Step 4: Simplify right side
    21,976.93x = 361,069,752.02
  5. Step 5: Solve for x
    x = 361,069,752.02/21,976.93
  6. Step 6: Final answer
    x = 16,429.49

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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.