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Finding the Fourth Proportional to 8,878.42, 13,313.31 and 4,720.42

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Solution

The fourth proportional to 8,878.42, 13,313.31 and 4,720.42 is: 7,078.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.42 : 13,313.31 = 4,720.42 : x
  2. Step 2: Convert to fraction form
    8,878.42/13,313.31 = 4,720.42/x
  3. Step 3: Cross multiply
    8,878.42x = 13,313.31 × 4,720.42
  4. Step 4: Simplify right side
    8,878.42x = 62,844,414.79
  5. Step 5: Solve for x
    x = 62,844,414.79/8,878.42
  6. Step 6: Final answer
    x = 7,078.33

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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.