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Finding the Fourth Proportional to 5,187.76, 7,158.76 and 2,829.88

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Solution

The fourth proportional to 5,187.76, 7,158.76 and 2,829.88 is: 3,905.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.76 : 7,158.76 = 2,829.88 : x
  2. Step 2: Convert to fraction form
    5,187.76/7,158.76 = 2,829.88/x
  3. Step 3: Cross multiply
    5,187.76x = 7,158.76 × 2,829.88
  4. Step 4: Simplify right side
    5,187.76x = 20,258,431.75
  5. Step 5: Solve for x
    x = 20,258,431.75/5,187.76
  6. Step 6: Final answer
    x = 3,905.04

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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.