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Finding the Fourth Proportional to 8,938.05, 13,393.38 and 4,778.64

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Solution

The fourth proportional to 8,938.05, 13,393.38 and 4,778.64 is: 7,160.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.05 : 13,393.38 = 4,778.64 : x
  2. Step 2: Convert to fraction form
    8,938.05/13,393.38 = 4,778.64/x
  3. Step 3: Cross multiply
    8,938.05x = 13,393.38 × 4,778.64
  4. Step 4: Simplify right side
    8,938.05x = 64,002,141.40
  5. Step 5: Solve for x
    x = 64,002,141.40/8,938.05
  6. Step 6: Final answer
    x = 7,160.64

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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.