Home / 30,661.65-42,313.44-18,561.96

Finding the Fourth Proportional to 30,661.65, 42,313.44 and 18,561.96

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Solution

The fourth proportional to 30,661.65, 42,313.44 and 18,561.96 is: 25,615.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,661.65 : 42,313.44 = 18,561.96 : x
  2. Step 2: Convert to fraction form
    30,661.65/42,313.44 = 18,561.96/x
  3. Step 3: Cross multiply
    30,661.65x = 42,313.44 × 18,561.96
  4. Step 4: Simplify right side
    30,661.65x = 785,420,380.74
  5. Step 5: Solve for x
    x = 785,420,380.74/30,661.65
  6. Step 6: Final answer
    x = 25,615.72

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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.