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Finding the Fourth Proportional to 7,921.44, 11,881.44 and 3,542.40

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Solution

The fourth proportional to 7,921.44, 11,881.44 and 3,542.40 is: 5,313.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.44 : 11,881.44 = 3,542.40 : x
  2. Step 2: Convert to fraction form
    7,921.44/11,881.44 = 3,542.40/x
  3. Step 3: Cross multiply
    7,921.44x = 11,881.44 × 3,542.40
  4. Step 4: Simplify right side
    7,921.44x = 42,088,813.06
  5. Step 5: Solve for x
    x = 42,088,813.06/7,921.44
  6. Step 6: Final answer
    x = 5,313.28

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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.