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Finding the Fourth Proportional to 30,609.54, 45,859.92 and 12,800.94

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Solution

The fourth proportional to 30,609.54, 45,859.92 and 12,800.94 is: 19,178.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,609.54 : 45,859.92 = 12,800.94 : x
  2. Step 2: Convert to fraction form
    30,609.54/45,859.92 = 12,800.94/x
  3. Step 3: Cross multiply
    30,609.54x = 45,859.92 × 12,800.94
  4. Step 4: Simplify right side
    30,609.54x = 587,050,084.32
  5. Step 5: Solve for x
    x = 587,050,084.32/30,609.54
  6. Step 6: Final answer
    x = 19,178.66

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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.