Home / 30,619.35-42,259.32-18,689.63

Finding the Fourth Proportional to 30,619.35, 42,259.32 and 18,689.63

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Solution

The fourth proportional to 30,619.35, 42,259.32 and 18,689.63 is: 25,794.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,619.35 : 42,259.32 = 18,689.63 : x
  2. Step 2: Convert to fraction form
    30,619.35/42,259.32 = 18,689.63/x
  3. Step 3: Cross multiply
    30,619.35x = 42,259.32 × 18,689.63
  4. Step 4: Simplify right side
    30,619.35x = 789,810,843.56
  5. Step 5: Solve for x
    x = 789,810,843.56/30,619.35
  6. Step 6: Final answer
    x = 25,794.50

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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.