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Finding the Fourth Proportional to 5,410.72, 8,111.12 and 1,947.12

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Solution

The fourth proportional to 5,410.72, 8,111.12 and 1,947.12 is: 2,918.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,410.72 : 8,111.12 = 1,947.12 : x
  2. Step 2: Convert to fraction form
    5,410.72/8,111.12 = 1,947.12/x
  3. Step 3: Cross multiply
    5,410.72x = 8,111.12 × 1,947.12
  4. Step 4: Simplify right side
    5,410.72x = 15,793,323.97
  5. Step 5: Solve for x
    x = 15,793,323.97/5,410.72
  6. Step 6: Final answer
    x = 2,918.90

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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.