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Finding the Fourth Proportional to 11,125.76, 16,688.32 and 2,805.76

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Solution

The fourth proportional to 11,125.76, 16,688.32 and 2,805.76 is: 4,208.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,125.76 : 16,688.32 = 2,805.76 : x
  2. Step 2: Convert to fraction form
    11,125.76/16,688.32 = 2,805.76/x
  3. Step 3: Cross multiply
    11,125.76x = 16,688.32 × 2,805.76
  4. Step 4: Simplify right side
    11,125.76x = 46,823,420.72
  5. Step 5: Solve for x
    x = 46,823,420.72/11,125.76
  6. Step 6: Final answer
    x = 4,208.56

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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.