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Finding the Fourth Proportional to 15,750.55, 21,736.74 and 8,676.97

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Solution

The fourth proportional to 15,750.55, 21,736.74 and 8,676.97 is: 11,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,750.55 : 21,736.74 = 8,676.97 : x
  2. Step 2: Convert to fraction form
    15,750.55/21,736.74 = 8,676.97/x
  3. Step 3: Cross multiply
    15,750.55x = 21,736.74 × 8,676.97
  4. Step 4: Simplify right side
    15,750.55x = 188,608,888.81
  5. Step 5: Solve for x
    x = 188,608,888.81/15,750.55
  6. Step 6: Final answer
    x = 11,974.75

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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.