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Finding the Fourth Proportional to 30,394.78, 45,560.58 and 12,635.08

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Solution

The fourth proportional to 30,394.78, 45,560.58 and 12,635.08 is: 18,939.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,394.78 : 45,560.58 = 12,635.08 : x
  2. Step 2: Convert to fraction form
    30,394.78/45,560.58 = 12,635.08/x
  3. Step 3: Cross multiply
    30,394.78x = 45,560.58 × 12,635.08
  4. Step 4: Simplify right side
    30,394.78x = 575,661,573.15
  5. Step 5: Solve for x
    x = 575,661,573.15/30,394.78
  6. Step 6: Final answer
    x = 18,939.49

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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.