Home / 39,896.88-55,056.64-21,991.96

Finding the Fourth Proportional to 39,896.88, 55,056.64 and 21,991.96

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Solution

The fourth proportional to 39,896.88, 55,056.64 and 21,991.96 is: 30,348.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.88 : 55,056.64 = 21,991.96 : x
  2. Step 2: Convert to fraction form
    39,896.88/55,056.64 = 21,991.96/x
  3. Step 3: Cross multiply
    39,896.88x = 55,056.64 × 21,991.96
  4. Step 4: Simplify right side
    39,896.88x = 1,210,803,247.31
  5. Step 5: Solve for x
    x = 1,210,803,247.31/39,896.88
  6. Step 6: Final answer
    x = 30,348.32

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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.