Home / 4,187.84-6,281.74-1,989.90

Finding the Fourth Proportional to 4,187.84, 6,281.74 and 1,989.90

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Solution

The fourth proportional to 4,187.84, 6,281.74 and 1,989.90 is: 2,984.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,187.84 : 6,281.74 = 1,989.90 : x
  2. Step 2: Convert to fraction form
    4,187.84/6,281.74 = 1,989.90/x
  3. Step 3: Cross multiply
    4,187.84x = 6,281.74 × 1,989.90
  4. Step 4: Simplify right side
    4,187.84x = 12,500,036.91
  5. Step 5: Solve for x
    x = 12,500,036.91/4,187.84
  6. Step 6: Final answer
    x = 2,984.84

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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.