Home / 30,996.97-42,760.78-18,412.81

Finding the Fourth Proportional to 30,996.97, 42,760.78 and 18,412.81

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Solution

The fourth proportional to 30,996.97, 42,760.78 and 18,412.81 is: 25,400.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,996.97 : 42,760.78 = 18,412.81 : x
  2. Step 2: Convert to fraction form
    30,996.97/42,760.78 = 18,412.81/x
  3. Step 3: Cross multiply
    30,996.97x = 42,760.78 × 18,412.81
  4. Step 4: Simplify right side
    30,996.97x = 787,346,117.59
  5. Step 5: Solve for x
    x = 787,346,117.59/30,996.97
  6. Step 6: Final answer
    x = 25,400.74

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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.