Home / 39,782.94-54,900.06-21,878.16

Finding the Fourth Proportional to 39,782.94, 54,900.06 and 21,878.16

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Solution

The fourth proportional to 39,782.94, 54,900.06 and 21,878.16 is: 30,191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.94 : 54,900.06 = 21,878.16 : x
  2. Step 2: Convert to fraction form
    39,782.94/54,900.06 = 21,878.16/x
  3. Step 3: Cross multiply
    39,782.94x = 54,900.06 × 21,878.16
  4. Step 4: Simplify right side
    39,782.94x = 1,201,112,296.69
  5. Step 5: Solve for x
    x = 1,201,112,296.69/39,782.94
  6. Step 6: Final answer
    x = 30,191.64

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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.