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Finding the Fourth Proportional to 30,891.32, 46,336.98 and 12,419

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Solution

The fourth proportional to 30,891.32, 46,336.98 and 12,419 is: 18,628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,891.32 : 46,336.98 = 12,419 : x
  2. Step 2: Convert to fraction form
    30,891.32/46,336.98 = 12,419/x
  3. Step 3: Cross multiply
    30,891.32x = 46,336.98 × 12,419
  4. Step 4: Simplify right side
    30,891.32x = 575,458,954.62
  5. Step 5: Solve for x
    x = 575,458,954.62/30,891.32
  6. Step 6: Final answer
    x = 18,628.50

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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.