Home / 5,403.07-8,109.21-2,118.45

Finding the Fourth Proportional to 5,403.07, 8,109.21 and 2,118.45

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Solution

The fourth proportional to 5,403.07, 8,109.21 and 2,118.45 is: 3,179.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,403.07 : 8,109.21 = 2,118.45 : x
  2. Step 2: Convert to fraction form
    5,403.07/8,109.21 = 2,118.45/x
  3. Step 3: Cross multiply
    5,403.07x = 8,109.21 × 2,118.45
  4. Step 4: Simplify right side
    5,403.07x = 17,178,994.28
  5. Step 5: Solve for x
    x = 17,178,994.28/5,403.07
  6. Step 6: Final answer
    x = 3,179.49

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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.