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Finding the Fourth Proportional to 30,147.52, 45,242.30 and 12,379.52

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Solution

The fourth proportional to 30,147.52, 45,242.30 and 12,379.52 is: 18,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,147.52 : 45,242.30 = 12,379.52 : x
  2. Step 2: Convert to fraction form
    30,147.52/45,242.30 = 12,379.52/x
  3. Step 3: Cross multiply
    30,147.52x = 45,242.30 × 12,379.52
  4. Step 4: Simplify right side
    30,147.52x = 560,077,669.59
  5. Step 5: Solve for x
    x = 560,077,669.59/30,147.52
  6. Step 6: Final answer
    x = 18,577.90

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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.