Home / 5,815.84-8,720.88-2,117.92

Finding the Fourth Proportional to 5,815.84, 8,720.88 and 2,117.92

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Solution

The fourth proportional to 5,815.84, 8,720.88 and 2,117.92 is: 3,175.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.84 : 8,720.88 = 2,117.92 : x
  2. Step 2: Convert to fraction form
    5,815.84/8,720.88 = 2,117.92/x
  3. Step 3: Cross multiply
    5,815.84x = 8,720.88 × 2,117.92
  4. Step 4: Simplify right side
    5,815.84x = 18,470,126.17
  5. Step 5: Solve for x
    x = 18,470,126.17/5,815.84
  6. Step 6: Final answer
    x = 3,175.83

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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.