Home / 5,125.05-7,687.12-1,427.20

Finding the Fourth Proportional to 5,125.05, 7,687.12 and 1,427.20

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Solution

The fourth proportional to 5,125.05, 7,687.12 and 1,427.20 is: 2,140.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,125.05 : 7,687.12 = 1,427.20 : x
  2. Step 2: Convert to fraction form
    5,125.05/7,687.12 = 1,427.20/x
  3. Step 3: Cross multiply
    5,125.05x = 7,687.12 × 1,427.20
  4. Step 4: Simplify right side
    5,125.05x = 10,971,057.66
  5. Step 5: Solve for x
    x = 10,971,057.66/5,125.05
  6. Step 6: Final answer
    x = 2,140.67

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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.