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Finding the Fourth Proportional to 30,361.70, 41,899.82 and 18,423.72

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Solution

The fourth proportional to 30,361.70, 41,899.82 and 18,423.72 is: 25,425.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,361.70 : 41,899.82 = 18,423.72 : x
  2. Step 2: Convert to fraction form
    30,361.70/41,899.82 = 18,423.72/x
  3. Step 3: Cross multiply
    30,361.70x = 41,899.82 × 18,423.72
  4. Step 4: Simplify right side
    30,361.70x = 771,950,459.61
  5. Step 5: Solve for x
    x = 771,950,459.61/30,361.70
  6. Step 6: Final answer
    x = 25,425.14

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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.