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Finding the Fourth Proportional to 30,609.88, 45,915.05 and 8,424.48

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Solution

The fourth proportional to 30,609.88, 45,915.05 and 8,424.48 is: 12,636.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,609.88 : 45,915.05 = 8,424.48 : x
  2. Step 2: Convert to fraction form
    30,609.88/45,915.05 = 8,424.48/x
  3. Step 3: Cross multiply
    30,609.88x = 45,915.05 × 8,424.48
  4. Step 4: Simplify right side
    30,609.88x = 386,810,484.53
  5. Step 5: Solve for x
    x = 386,810,484.53/30,609.88
  6. Step 6: Final answer
    x = 12,636.78

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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.