Home / 7,129.20-9,835.79-4,144.35

Finding the Fourth Proportional to 7,129.20, 9,835.79 and 4,144.35

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Solution

The fourth proportional to 7,129.20, 9,835.79 and 4,144.35 is: 5,717.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.20 : 9,835.79 = 4,144.35 : x
  2. Step 2: Convert to fraction form
    7,129.20/9,835.79 = 4,144.35/x
  3. Step 3: Cross multiply
    7,129.20x = 9,835.79 × 4,144.35
  4. Step 4: Simplify right side
    7,129.20x = 40,762,935.56
  5. Step 5: Solve for x
    x = 40,762,935.56/7,129.20
  6. Step 6: Final answer
    x = 5,717.74

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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.