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Finding the Fourth Proportional to 5,015.52, 6,921 and 2,890.98

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Solution

The fourth proportional to 5,015.52, 6,921 and 2,890.98 is: 3,989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015.52 : 6,921 = 2,890.98 : x
  2. Step 2: Convert to fraction form
    5,015.52/6,921 = 2,890.98/x
  3. Step 3: Cross multiply
    5,015.52x = 6,921 × 2,890.98
  4. Step 4: Simplify right side
    5,015.52x = 20,008,472.58
  5. Step 5: Solve for x
    x = 20,008,472.58/5,015.52
  6. Step 6: Final answer
    x = 3,989.31

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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.