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Finding the Fourth Proportional to 12,334.32, 18,485.91 and 7,890.30

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Solution

The fourth proportional to 12,334.32, 18,485.91 and 7,890.30 is: 11,825.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,334.32 : 18,485.91 = 7,890.30 : x
  2. Step 2: Convert to fraction form
    12,334.32/18,485.91 = 7,890.30/x
  3. Step 3: Cross multiply
    12,334.32x = 18,485.91 × 7,890.30
  4. Step 4: Simplify right side
    12,334.32x = 145,859,375.67
  5. Step 5: Solve for x
    x = 145,859,375.67/12,334.32
  6. Step 6: Final answer
    x = 11,825.49

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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.