Home / 30,486.61-42,078.09-18,553.80

Finding the Fourth Proportional to 30,486.61, 42,078.09 and 18,553.80

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Solution

The fourth proportional to 30,486.61, 42,078.09 and 18,553.80 is: 25,608.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.61 : 42,078.09 = 18,553.80 : x
  2. Step 2: Convert to fraction form
    30,486.61/42,078.09 = 18,553.80/x
  3. Step 3: Cross multiply
    30,486.61x = 42,078.09 × 18,553.80
  4. Step 4: Simplify right side
    30,486.61x = 780,708,466.24
  5. Step 5: Solve for x
    x = 780,708,466.24/30,486.61
  6. Step 6: Final answer
    x = 25,608.24

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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.