Home / 30,215.88-41,690.43-18,867.78

Finding the Fourth Proportional to 30,215.88, 41,690.43 and 18,867.78

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Solution

The fourth proportional to 30,215.88, 41,690.43 and 18,867.78 is: 26,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215.88 : 41,690.43 = 18,867.78 : x
  2. Step 2: Convert to fraction form
    30,215.88/41,690.43 = 18,867.78/x
  3. Step 3: Cross multiply
    30,215.88x = 41,690.43 × 18,867.78
  4. Step 4: Simplify right side
    30,215.88x = 786,605,861.35
  5. Step 5: Solve for x
    x = 786,605,861.35/30,215.88
  6. Step 6: Final answer
    x = 26,032.86

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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.