Home / 3,129.84-4,318.88-1,870.65

Finding the Fourth Proportional to 3,129.84, 4,318.88 and 1,870.65

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Solution

The fourth proportional to 3,129.84, 4,318.88 and 1,870.65 is: 2,581.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.84 : 4,318.88 = 1,870.65 : x
  2. Step 2: Convert to fraction form
    3,129.84/4,318.88 = 1,870.65/x
  3. Step 3: Cross multiply
    3,129.84x = 4,318.88 × 1,870.65
  4. Step 4: Simplify right side
    3,129.84x = 8,079,091.28
  5. Step 5: Solve for x
    x = 8,079,091.28/3,129.84
  6. Step 6: Final answer
    x = 2,581.31

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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.