Home / 30,949.18-42,720.03-18,201.80

Finding the Fourth Proportional to 30,949.18, 42,720.03 and 18,201.80

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Solution

The fourth proportional to 30,949.18, 42,720.03 and 18,201.80 is: 25,124.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,949.18 : 42,720.03 = 18,201.80 : x
  2. Step 2: Convert to fraction form
    30,949.18/42,720.03 = 18,201.80/x
  3. Step 3: Cross multiply
    30,949.18x = 42,720.03 × 18,201.80
  4. Step 4: Simplify right side
    30,949.18x = 777,581,548.85
  5. Step 5: Solve for x
    x = 777,581,548.85/30,949.18
  6. Step 6: Final answer
    x = 25,124.47

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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.