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Finding the Fourth Proportional to 8,821.51, 13,212.82 and 5,351.47

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Solution

The fourth proportional to 8,821.51, 13,212.82 and 5,351.47 is: 8,015.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.51 : 13,212.82 = 5,351.47 : x
  2. Step 2: Convert to fraction form
    8,821.51/13,212.82 = 5,351.47/x
  3. Step 3: Cross multiply
    8,821.51x = 13,212.82 × 5,351.47
  4. Step 4: Simplify right side
    8,821.51x = 70,707,917.02
  5. Step 5: Solve for x
    x = 70,707,917.02/8,821.51
  6. Step 6: Final answer
    x = 8,015.40

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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.