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Finding the Fourth Proportional to 5,145.88, 7,101.44 and 2,788.12

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Solution

The fourth proportional to 5,145.88, 7,101.44 and 2,788.12 is: 3,847.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.88 : 7,101.44 = 2,788.12 : x
  2. Step 2: Convert to fraction form
    5,145.88/7,101.44 = 2,788.12/x
  3. Step 3: Cross multiply
    5,145.88x = 7,101.44 × 2,788.12
  4. Step 4: Simplify right side
    5,145.88x = 19,799,666.89
  5. Step 5: Solve for x
    x = 19,799,666.89/5,145.88
  6. Step 6: Final answer
    x = 3,847.67

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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.