Home / 5,187.91-7,780.77-1,678.27

Finding the Fourth Proportional to 5,187.91, 7,780.77 and 1,678.27

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Solution

The fourth proportional to 5,187.91, 7,780.77 and 1,678.27 is: 2,517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.91 : 7,780.77 = 1,678.27 : x
  2. Step 2: Convert to fraction form
    5,187.91/7,780.77 = 1,678.27/x
  3. Step 3: Cross multiply
    5,187.91x = 7,780.77 × 1,678.27
  4. Step 4: Simplify right side
    5,187.91x = 13,058,232.87
  5. Step 5: Solve for x
    x = 13,058,232.87/5,187.91
  6. Step 6: Final answer
    x = 2,517.05

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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.