Home / 30,936.96-42,660.73-18,359.28

Finding the Fourth Proportional to 30,936.96, 42,660.73 and 18,359.28

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Solution

The fourth proportional to 30,936.96, 42,660.73 and 18,359.28 is: 25,316.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.96 : 42,660.73 = 18,359.28 : x
  2. Step 2: Convert to fraction form
    30,936.96/42,660.73 = 18,359.28/x
  3. Step 3: Cross multiply
    30,936.96x = 42,660.73 × 18,359.28
  4. Step 4: Simplify right side
    30,936.96x = 783,220,287.07
  5. Step 5: Solve for x
    x = 783,220,287.07/30,936.96
  6. Step 6: Final answer
    x = 25,316.65

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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.