Home / 5,420.09-8,129.32-2,087.48

Finding the Fourth Proportional to 5,420.09, 8,129.32 and 2,087.48

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Solution

The fourth proportional to 5,420.09, 8,129.32 and 2,087.48 is: 3,130.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.09 : 8,129.32 = 2,087.48 : x
  2. Step 2: Convert to fraction form
    5,420.09/8,129.32 = 2,087.48/x
  3. Step 3: Cross multiply
    5,420.09x = 8,129.32 × 2,087.48
  4. Step 4: Simplify right side
    5,420.09x = 16,969,792.91
  5. Step 5: Solve for x
    x = 16,969,792.91/5,420.09
  6. Step 6: Final answer
    x = 3,130.91

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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.