Home / 7,418.77-11,128.13-1,872.55

Finding the Fourth Proportional to 7,418.77, 11,128.13 and 1,872.55

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Solution

The fourth proportional to 7,418.77, 11,128.13 and 1,872.55 is: 2,808.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.77 : 11,128.13 = 1,872.55 : x
  2. Step 2: Convert to fraction form
    7,418.77/11,128.13 = 1,872.55/x
  3. Step 3: Cross multiply
    7,418.77x = 11,128.13 × 1,872.55
  4. Step 4: Simplify right side
    7,418.77x = 20,837,991.40
  5. Step 5: Solve for x
    x = 20,837,991.40/7,418.77
  6. Step 6: Final answer
    x = 2,808.82

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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.