Home / 21,976.76-30,328.02-11,905.22

Finding the Fourth Proportional to 21,976.76, 30,328.02 and 11,905.22

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Solution

The fourth proportional to 21,976.76, 30,328.02 and 11,905.22 is: 16,429.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.76 : 30,328.02 = 11,905.22 : x
  2. Step 2: Convert to fraction form
    21,976.76/30,328.02 = 11,905.22/x
  3. Step 3: Cross multiply
    21,976.76x = 30,328.02 × 11,905.22
  4. Step 4: Simplify right side
    21,976.76x = 361,061,750.26
  5. Step 5: Solve for x
    x = 361,061,750.26/21,976.76
  6. Step 6: Final answer
    x = 16,429.25

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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.