Home / 6,320.37-8,720.58-3,929.76

Finding the Fourth Proportional to 6,320.37, 8,720.58 and 3,929.76

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Solution

The fourth proportional to 6,320.37, 8,720.58 and 3,929.76 is: 5,422.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,320.37 : 8,720.58 = 3,929.76 : x
  2. Step 2: Convert to fraction form
    6,320.37/8,720.58 = 3,929.76/x
  3. Step 3: Cross multiply
    6,320.37x = 8,720.58 × 3,929.76
  4. Step 4: Simplify right side
    6,320.37x = 34,269,786.46
  5. Step 5: Solve for x
    x = 34,269,786.46/6,320.37
  6. Step 6: Final answer
    x = 5,422.12

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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.