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Finding the Fourth Proportional to 30,191.91, 45,218.90 and 14,408.03

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Solution

The fourth proportional to 30,191.91, 45,218.90 and 14,408.03 is: 21,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,191.91 : 45,218.90 = 14,408.03 : x
  2. Step 2: Convert to fraction form
    30,191.91/45,218.90 = 14,408.03/x
  3. Step 3: Cross multiply
    30,191.91x = 45,218.90 × 14,408.03
  4. Step 4: Simplify right side
    30,191.91x = 651,515,208.61
  5. Step 5: Solve for x
    x = 651,515,208.61/30,191.91
  6. Step 6: Final answer
    x = 21,579.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.