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Finding the Fourth Proportional to 30,672.72, 45,999.30 and 9,891.36

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Solution

The fourth proportional to 30,672.72, 45,999.30 and 9,891.36 is: 14,833.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,672.72 : 45,999.30 = 9,891.36 : x
  2. Step 2: Convert to fraction form
    30,672.72/45,999.30 = 9,891.36/x
  3. Step 3: Cross multiply
    30,672.72x = 45,999.30 × 9,891.36
  4. Step 4: Simplify right side
    30,672.72x = 454,995,636.05
  5. Step 5: Solve for x
    x = 454,995,636.05/30,672.72
  6. Step 6: Final answer
    x = 14,833.89

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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.