Home / 30,745.08-42,431.40-18,816.36

Finding the Fourth Proportional to 30,745.08, 42,431.40 and 18,816.36

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Solution

The fourth proportional to 30,745.08, 42,431.40 and 18,816.36 is: 25,968.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,745.08 : 42,431.40 = 18,816.36 : x
  2. Step 2: Convert to fraction form
    30,745.08/42,431.40 = 18,816.36/x
  3. Step 3: Cross multiply
    30,745.08x = 42,431.40 × 18,816.36
  4. Step 4: Simplify right side
    30,745.08x = 798,404,497.70
  5. Step 5: Solve for x
    x = 798,404,497.70/30,745.08
  6. Step 6: Final answer
    x = 25,968.53

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Double scale
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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.