Home / 5,639.80-8,458.41-2,130.18

Finding the Fourth Proportional to 5,639.80, 8,458.41 and 2,130.18

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Solution

The fourth proportional to 5,639.80, 8,458.41 and 2,130.18 is: 3,194.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.80 : 8,458.41 = 2,130.18 : x
  2. Step 2: Convert to fraction form
    5,639.80/8,458.41 = 2,130.18/x
  3. Step 3: Cross multiply
    5,639.80x = 8,458.41 × 2,130.18
  4. Step 4: Simplify right side
    5,639.80x = 18,017,935.81
  5. Step 5: Solve for x
    x = 18,017,935.81/5,639.80
  6. Step 6: Final answer
    x = 3,194.78

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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.