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Finding the Fourth Proportional to 3,891.04, 5,363.76 and 2,947.12

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Solution

The fourth proportional to 3,891.04, 5,363.76 and 2,947.12 is: 4,062.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.04 : 5,363.76 = 2,947.12 : x
  2. Step 2: Convert to fraction form
    3,891.04/5,363.76 = 2,947.12/x
  3. Step 3: Cross multiply
    3,891.04x = 5,363.76 × 2,947.12
  4. Step 4: Simplify right side
    3,891.04x = 15,807,644.37
  5. Step 5: Solve for x
    x = 15,807,644.37/3,891.04
  6. Step 6: Final answer
    x = 4,062.58

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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.