Home / 30,977.82-42,735.66-18,395.28

Finding the Fourth Proportional to 30,977.82, 42,735.66 and 18,395.28

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Solution

The fourth proportional to 30,977.82, 42,735.66 and 18,395.28 is: 25,377.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,977.82 : 42,735.66 = 18,395.28 : x
  2. Step 2: Convert to fraction form
    30,977.82/42,735.66 = 18,395.28/x
  3. Step 3: Cross multiply
    30,977.82x = 42,735.66 × 18,395.28
  4. Step 4: Simplify right side
    30,977.82x = 786,134,431.68
  5. Step 5: Solve for x
    x = 786,134,431.68/30,977.82
  6. Step 6: Final answer
    x = 25,377.33

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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.