Home / 5,142.16-7,083.48-4,878.64

Finding the Fourth Proportional to 5,142.16, 7,083.48 and 4,878.64

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Solution

The fourth proportional to 5,142.16, 7,083.48 and 4,878.64 is: 6,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,142.16 : 7,083.48 = 4,878.64 : x
  2. Step 2: Convert to fraction form
    5,142.16/7,083.48 = 4,878.64/x
  3. Step 3: Cross multiply
    5,142.16x = 7,083.48 × 4,878.64
  4. Step 4: Simplify right side
    5,142.16x = 34,557,748.87
  5. Step 5: Solve for x
    x = 34,557,748.87/5,142.16
  6. Step 6: Final answer
    x = 6,720.47

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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.