Home / 5,129.63-7,688.97-2,661.05

Finding the Fourth Proportional to 5,129.63, 7,688.97 and 2,661.05

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Solution

The fourth proportional to 5,129.63, 7,688.97 and 2,661.05 is: 3,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.63 : 7,688.97 = 2,661.05 : x
  2. Step 2: Convert to fraction form
    5,129.63/7,688.97 = 2,661.05/x
  3. Step 3: Cross multiply
    5,129.63x = 7,688.97 × 2,661.05
  4. Step 4: Simplify right side
    5,129.63x = 20,460,733.62
  5. Step 5: Solve for x
    x = 20,460,733.62/5,129.63
  6. Step 6: Final answer
    x = 3,988.73

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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.