Home / 30,019.35-41,374.56-21,939.78

Finding the Fourth Proportional to 30,019.35, 41,374.56 and 21,939.78

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Solution

The fourth proportional to 30,019.35, 41,374.56 and 21,939.78 is: 30,238.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,019.35 : 41,374.56 = 21,939.78 : x
  2. Step 2: Convert to fraction form
    30,019.35/41,374.56 = 21,939.78/x
  3. Step 3: Cross multiply
    30,019.35x = 41,374.56 × 21,939.78
  4. Step 4: Simplify right side
    30,019.35x = 907,748,744.00
  5. Step 5: Solve for x
    x = 907,748,744.00/30,019.35
  6. Step 6: Final answer
    x = 30,238.79

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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.