Home / 3,124.79-4,304.89-2,178.86

Finding the Fourth Proportional to 3,124.79, 4,304.89 and 2,178.86

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Solution

The fourth proportional to 3,124.79, 4,304.89 and 2,178.86 is: 3,001.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.79 : 4,304.89 = 2,178.86 : x
  2. Step 2: Convert to fraction form
    3,124.79/4,304.89 = 2,178.86/x
  3. Step 3: Cross multiply
    3,124.79x = 4,304.89 × 2,178.86
  4. Step 4: Simplify right side
    3,124.79x = 9,379,725.65
  5. Step 5: Solve for x
    x = 9,379,725.65/3,124.79
  6. Step 6: Final answer
    x = 3,001.72

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1.5x scale

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.