Home / 30,431.70-45,651.20-12,899.25

Finding the Fourth Proportional to 30,431.70, 45,651.20 and 12,899.25

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Solution

The fourth proportional to 30,431.70, 45,651.20 and 12,899.25 is: 19,350.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.70 : 45,651.20 = 12,899.25 : x
  2. Step 2: Convert to fraction form
    30,431.70/45,651.20 = 12,899.25/x
  3. Step 3: Cross multiply
    30,431.70x = 45,651.20 × 12,899.25
  4. Step 4: Simplify right side
    30,431.70x = 588,866,177.10
  5. Step 5: Solve for x
    x = 588,866,177.10/30,431.70
  6. Step 6: Final answer
    x = 19,350.42

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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.