Home / 30,954.78-42,717.77-18,208.49

Finding the Fourth Proportional to 30,954.78, 42,717.77 and 18,208.49

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Solution

The fourth proportional to 30,954.78, 42,717.77 and 18,208.49 is: 25,127.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,954.78 : 42,717.77 = 18,208.49 : x
  2. Step 2: Convert to fraction form
    30,954.78/42,717.77 = 18,208.49/x
  3. Step 3: Cross multiply
    30,954.78x = 42,717.77 × 18,208.49
  4. Step 4: Simplify right side
    30,954.78x = 777,825,783.24
  5. Step 5: Solve for x
    x = 777,825,783.24/30,954.78
  6. Step 6: Final answer
    x = 25,127.81

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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.