Home / 39,078.93-53,928.49-21,172.87

Finding the Fourth Proportional to 39,078.93, 53,928.49 and 21,172.87

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Solution

The fourth proportional to 39,078.93, 53,928.49 and 21,172.87 is: 29,218.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,078.93 : 53,928.49 = 21,172.87 : x
  2. Step 2: Convert to fraction form
    39,078.93/53,928.49 = 21,172.87/x
  3. Step 3: Cross multiply
    39,078.93x = 53,928.49 × 21,172.87
  4. Step 4: Simplify right side
    39,078.93x = 1,141,820,908.07
  5. Step 5: Solve for x
    x = 1,141,820,908.07/39,078.93
  6. Step 6: Final answer
    x = 29,218.33

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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.