Home / 5,418.84-8,128.50-1,720.99

Finding the Fourth Proportional to 5,418.84, 8,128.50 and 1,720.99

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Solution

The fourth proportional to 5,418.84, 8,128.50 and 1,720.99 is: 2,581.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.84 : 8,128.50 = 1,720.99 : x
  2. Step 2: Convert to fraction form
    5,418.84/8,128.50 = 1,720.99/x
  3. Step 3: Cross multiply
    5,418.84x = 8,128.50 × 1,720.99
  4. Step 4: Simplify right side
    5,418.84x = 13,989,070.92
  5. Step 5: Solve for x
    x = 13,989,070.92/5,418.84
  6. Step 6: Final answer
    x = 2,581.56

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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.