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Finding the Fourth Proportional to 8,906.05, 12,290.55 and 4,927.45

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Solution

The fourth proportional to 8,906.05, 12,290.55 and 4,927.45 is: 6,799.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.05 : 12,290.55 = 4,927.45 : x
  2. Step 2: Convert to fraction form
    8,906.05/12,290.55 = 4,927.45/x
  3. Step 3: Cross multiply
    8,906.05x = 12,290.55 × 4,927.45
  4. Step 4: Simplify right side
    8,906.05x = 60,560,984.51
  5. Step 5: Solve for x
    x = 60,560,984.51/8,906.05
  6. Step 6: Final answer
    x = 6,799.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.