Home / 5,178.69-7,146.77-2,821.05

Finding the Fourth Proportional to 5,178.69, 7,146.77 and 2,821.05

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Solution

The fourth proportional to 5,178.69, 7,146.77 and 2,821.05 is: 3,893.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.69 : 7,146.77 = 2,821.05 : x
  2. Step 2: Convert to fraction form
    5,178.69/7,146.77 = 2,821.05/x
  3. Step 3: Cross multiply
    5,178.69x = 7,146.77 × 2,821.05
  4. Step 4: Simplify right side
    5,178.69x = 20,161,381.40
  5. Step 5: Solve for x
    x = 20,161,381.40/5,178.69
  6. Step 6: Final answer
    x = 3,893.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.