Home / 5,120.61-7,682.79-2,159.81

Finding the Fourth Proportional to 5,120.61, 7,682.79 and 2,159.81

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Solution

The fourth proportional to 5,120.61, 7,682.79 and 2,159.81 is: 3,240.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.61 : 7,682.79 = 2,159.81 : x
  2. Step 2: Convert to fraction form
    5,120.61/7,682.79 = 2,159.81/x
  3. Step 3: Cross multiply
    5,120.61x = 7,682.79 × 2,159.81
  4. Step 4: Simplify right side
    5,120.61x = 16,593,328.26
  5. Step 5: Solve for x
    x = 16,593,328.26/5,120.61
  6. Step 6: Final answer
    x = 3,240.50

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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.