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Finding the Fourth Proportional to 7,893.18, 11,788.56 and 7,151.31

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Solution

The fourth proportional to 7,893.18, 11,788.56 and 7,151.31 is: 10,680.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,893.18 : 11,788.56 = 7,151.31 : x
  2. Step 2: Convert to fraction form
    7,893.18/11,788.56 = 7,151.31/x
  3. Step 3: Cross multiply
    7,893.18x = 11,788.56 × 7,151.31
  4. Step 4: Simplify right side
    7,893.18x = 84,303,647.01
  5. Step 5: Solve for x
    x = 84,303,647.01/7,893.18
  6. Step 6: Final answer
    x = 10,680.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.