Home / 7,129.28-10,695.44-4,209.76

Finding the Fourth Proportional to 7,129.28, 10,695.44 and 4,209.76

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Solution

The fourth proportional to 7,129.28, 10,695.44 and 4,209.76 is: 6,315.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.28 : 10,695.44 = 4,209.76 : x
  2. Step 2: Convert to fraction form
    7,129.28/10,695.44 = 4,209.76/x
  3. Step 3: Cross multiply
    7,129.28x = 10,695.44 × 4,209.76
  4. Step 4: Simplify right side
    7,129.28x = 45,025,235.49
  5. Step 5: Solve for x
    x = 45,025,235.49/7,129.28
  6. Step 6: Final answer
    x = 6,315.54

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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.