Home / 5,639.39-8,460.57-2,129.45

Finding the Fourth Proportional to 5,639.39, 8,460.57 and 2,129.45

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Solution

The fourth proportional to 5,639.39, 8,460.57 and 2,129.45 is: 3,194.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.39 : 8,460.57 = 2,129.45 : x
  2. Step 2: Convert to fraction form
    5,639.39/8,460.57 = 2,129.45/x
  3. Step 3: Cross multiply
    5,639.39x = 8,460.57 × 2,129.45
  4. Step 4: Simplify right side
    5,639.39x = 18,016,360.79
  5. Step 5: Solve for x
    x = 18,016,360.79/5,639.39
  6. Step 6: Final answer
    x = 3,194.74

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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.