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Finding the Fourth Proportional to 3,833.80, 5,289.70 and 2,154.87

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Solution

The fourth proportional to 3,833.80, 5,289.70 and 2,154.87 is: 2,973.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,833.80 : 5,289.70 = 2,154.87 : x
  2. Step 2: Convert to fraction form
    3,833.80/5,289.70 = 2,154.87/x
  3. Step 3: Cross multiply
    3,833.80x = 5,289.70 × 2,154.87
  4. Step 4: Simplify right side
    3,833.80x = 11,398,605.06
  5. Step 5: Solve for x
    x = 11,398,605.06/3,833.80
  6. Step 6: Final answer
    x = 2,973.19

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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.