Home / 39,786.54-54,903.26-21,878.66

Finding the Fourth Proportional to 39,786.54, 54,903.26 and 21,878.66

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Solution

The fourth proportional to 39,786.54, 54,903.26 and 21,878.66 is: 30,191.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.54 : 54,903.26 = 21,878.66 : x
  2. Step 2: Convert to fraction form
    39,786.54/54,903.26 = 21,878.66/x
  3. Step 3: Cross multiply
    39,786.54x = 54,903.26 × 21,878.66
  4. Step 4: Simplify right side
    39,786.54x = 1,201,209,374.52
  5. Step 5: Solve for x
    x = 1,201,209,374.52/39,786.54
  6. Step 6: Final answer
    x = 30,191.35

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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.