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Finding the Fourth Proportional to 7,219.95, 9,954.27 and 5,921.64

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Solution

The fourth proportional to 7,219.95, 9,954.27 and 5,921.64 is: 8,164.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,219.95 : 9,954.27 = 5,921.64 : x
  2. Step 2: Convert to fraction form
    7,219.95/9,954.27 = 5,921.64/x
  3. Step 3: Cross multiply
    7,219.95x = 9,954.27 × 5,921.64
  4. Step 4: Simplify right side
    7,219.95x = 58,945,603.40
  5. Step 5: Solve for x
    x = 58,945,603.40/7,219.95
  6. Step 6: Final answer
    x = 8,164.27

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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.