Home / 39,780.12-54,895.09-21,874.06

Finding the Fourth Proportional to 39,780.12, 54,895.09 and 21,874.06

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Solution

The fourth proportional to 39,780.12, 54,895.09 and 21,874.06 is: 30,185.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.12 : 54,895.09 = 21,874.06 : x
  2. Step 2: Convert to fraction form
    39,780.12/54,895.09 = 21,874.06/x
  3. Step 3: Cross multiply
    39,780.12x = 54,895.09 × 21,874.06
  4. Step 4: Simplify right side
    39,780.12x = 1,200,778,492.37
  5. Step 5: Solve for x
    x = 1,200,778,492.37/39,780.12
  6. Step 6: Final answer
    x = 30,185.39

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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.