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Finding the Fourth Proportional to 12,447.61, 18,627.54 and 7,769.82

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Solution

The fourth proportional to 12,447.61, 18,627.54 and 7,769.82 is: 11,627.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447.61 : 18,627.54 = 7,769.82 : x
  2. Step 2: Convert to fraction form
    12,447.61/18,627.54 = 7,769.82/x
  3. Step 3: Cross multiply
    12,447.61x = 18,627.54 × 7,769.82
  4. Step 4: Simplify right side
    12,447.61x = 144,732,632.84
  5. Step 5: Solve for x
    x = 144,732,632.84/12,447.61
  6. Step 6: Final answer
    x = 11,627.34

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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.