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Finding the Fourth Proportional to 12,546.86, 18,819.06 and 7,615.16

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Solution

The fourth proportional to 12,546.86, 18,819.06 and 7,615.16 is: 11,421.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,546.86 : 18,819.06 = 7,615.16 : x
  2. Step 2: Convert to fraction form
    12,546.86/18,819.06 = 7,615.16/x
  3. Step 3: Cross multiply
    12,546.86x = 18,819.06 × 7,615.16
  4. Step 4: Simplify right side
    12,546.86x = 143,310,152.95
  5. Step 5: Solve for x
    x = 143,310,152.95/12,546.86
  6. Step 6: Final answer
    x = 11,421.99

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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.