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Finding the Fourth Proportional to 30,628.32, 45,915.72 and 11,895.48

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Solution

The fourth proportional to 30,628.32, 45,915.72 and 11,895.48 is: 17,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.32 : 45,915.72 = 11,895.48 : x
  2. Step 2: Convert to fraction form
    30,628.32/45,915.72 = 11,895.48/x
  3. Step 3: Cross multiply
    30,628.32x = 45,915.72 × 11,895.48
  4. Step 4: Simplify right side
    30,628.32x = 546,189,528.95
  5. Step 5: Solve for x
    x = 546,189,528.95/30,628.32
  6. Step 6: Final answer
    x = 17,832.83

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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.