Home / 5,812.45-8,721.19-2,115.20

Finding the Fourth Proportional to 5,812.45, 8,721.19 and 2,115.20

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Solution

The fourth proportional to 5,812.45, 8,721.19 and 2,115.20 is: 3,173.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,812.45 : 8,721.19 = 2,115.20 : x
  2. Step 2: Convert to fraction form
    5,812.45/8,721.19 = 2,115.20/x
  3. Step 3: Cross multiply
    5,812.45x = 8,721.19 × 2,115.20
  4. Step 4: Simplify right side
    5,812.45x = 18,447,050.51
  5. Step 5: Solve for x
    x = 18,447,050.51/5,812.45
  6. Step 6: Final answer
    x = 3,173.72

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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.