Home / 5,156.64-7,115.56-2,888.12

Finding the Fourth Proportional to 5,156.64, 7,115.56 and 2,888.12

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Solution

The fourth proportional to 5,156.64, 7,115.56 and 2,888.12 is: 3,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.64 : 7,115.56 = 2,888.12 : x
  2. Step 2: Convert to fraction form
    5,156.64/7,115.56 = 2,888.12/x
  3. Step 3: Cross multiply
    5,156.64x = 7,115.56 × 2,888.12
  4. Step 4: Simplify right side
    5,156.64x = 20,550,601.72
  5. Step 5: Solve for x
    x = 20,550,601.72/5,156.64
  6. Step 6: Final answer
    x = 3,985.27

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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.