Home / 30,481.57-42,071.15-18,548.75

Finding the Fourth Proportional to 30,481.57, 42,071.15 and 18,548.75

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Solution

The fourth proportional to 30,481.57, 42,071.15 and 18,548.75 is: 25,601.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.57 : 42,071.15 = 18,548.75 : x
  2. Step 2: Convert to fraction form
    30,481.57/42,071.15 = 18,548.75/x
  3. Step 3: Cross multiply
    30,481.57x = 42,071.15 × 18,548.75
  4. Step 4: Simplify right side
    30,481.57x = 780,367,395.11
  5. Step 5: Solve for x
    x = 780,367,395.11/30,481.57
  6. Step 6: Final answer
    x = 25,601.29

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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.