Home / 5,415.45-8,118.71-2,639.17

Finding the Fourth Proportional to 5,415.45, 8,118.71 and 2,639.17

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Solution

The fourth proportional to 5,415.45, 8,118.71 and 2,639.17 is: 3,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.45 : 8,118.71 = 2,639.17 : x
  2. Step 2: Convert to fraction form
    5,415.45/8,118.71 = 2,639.17/x
  3. Step 3: Cross multiply
    5,415.45x = 8,118.71 × 2,639.17
  4. Step 4: Simplify right side
    5,415.45x = 21,426,655.87
  5. Step 5: Solve for x
    x = 21,426,655.87/5,415.45
  6. Step 6: Final answer
    x = 3,956.58

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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.