Home / 39,893.13-55,055.81-21,991.64

Finding the Fourth Proportional to 39,893.13, 55,055.81 and 21,991.64

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Solution

The fourth proportional to 39,893.13, 55,055.81 and 21,991.64 is: 30,350.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,893.13 : 55,055.81 = 21,991.64 : x
  2. Step 2: Convert to fraction form
    39,893.13/55,055.81 = 21,991.64/x
  3. Step 3: Cross multiply
    39,893.13x = 55,055.81 × 21,991.64
  4. Step 4: Simplify right side
    39,893.13x = 1,210,767,333.13
  5. Step 5: Solve for x
    x = 1,210,767,333.13/39,893.13
  6. Step 6: Final answer
    x = 30,350.27

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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.