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Finding the Fourth Proportional to 30,447.88, 41,990.85 and 19,118.43

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Solution

The fourth proportional to 30,447.88, 41,990.85 and 19,118.43 is: 26,366.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,447.88 : 41,990.85 = 19,118.43 : x
  2. Step 2: Convert to fraction form
    30,447.88/41,990.85 = 19,118.43/x
  3. Step 3: Cross multiply
    30,447.88x = 41,990.85 × 19,118.43
  4. Step 4: Simplify right side
    30,447.88x = 802,799,126.37
  5. Step 5: Solve for x
    x = 802,799,126.37/30,447.88
  6. Step 6: Final answer
    x = 26,366.34

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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.