Home / 5,639.12-7,781.46-3,281.39

Finding the Fourth Proportional to 5,639.12, 7,781.46 and 3,281.39

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Solution

The fourth proportional to 5,639.12, 7,781.46 and 3,281.39 is: 4,528.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.12 : 7,781.46 = 3,281.39 : x
  2. Step 2: Convert to fraction form
    5,639.12/7,781.46 = 3,281.39/x
  3. Step 3: Cross multiply
    5,639.12x = 7,781.46 × 3,281.39
  4. Step 4: Simplify right side
    5,639.12x = 25,534,005.03
  5. Step 5: Solve for x
    x = 25,534,005.03/5,639.12
  6. Step 6: Final answer
    x = 4,528.01

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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.