Home / 8,385.51-12,578.37-2,145.57

Finding the Fourth Proportional to 8,385.51, 12,578.37 and 2,145.57

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Solution

The fourth proportional to 8,385.51, 12,578.37 and 2,145.57 is: 3,218.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.51 : 12,578.37 = 2,145.57 : x
  2. Step 2: Convert to fraction form
    8,385.51/12,578.37 = 2,145.57/x
  3. Step 3: Cross multiply
    8,385.51x = 12,578.37 × 2,145.57
  4. Step 4: Simplify right side
    8,385.51x = 26,987,773.32
  5. Step 5: Solve for x
    x = 26,987,773.32/8,385.51
  6. Step 6: Final answer
    x = 3,218.38

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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.