Home / 5,142.77-7,712.55-1,855.43

Finding the Fourth Proportional to 5,142.77, 7,712.55 and 1,855.43

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Solution

The fourth proportional to 5,142.77, 7,712.55 and 1,855.43 is: 2,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.77 : 7,712.55 = 1,855.43 : x
  2. Step 2: Convert to fraction form
    5,142.77/7,712.55 = 1,855.43/x
  3. Step 3: Cross multiply
    5,142.77x = 7,712.55 × 1,855.43
  4. Step 4: Simplify right side
    5,142.77x = 14,310,090.48
  5. Step 5: Solve for x
    x = 14,310,090.48/5,142.77
  6. Step 6: Final answer
    x = 2,782.57

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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.