Home / 5,178.46-7,766.93-1,890.78

Finding the Fourth Proportional to 5,178.46, 7,766.93 and 1,890.78

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Solution

The fourth proportional to 5,178.46, 7,766.93 and 1,890.78 is: 2,835.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.46 : 7,766.93 = 1,890.78 : x
  2. Step 2: Convert to fraction form
    5,178.46/7,766.93 = 1,890.78/x
  3. Step 3: Cross multiply
    5,178.46x = 7,766.93 × 1,890.78
  4. Step 4: Simplify right side
    5,178.46x = 14,685,555.91
  5. Step 5: Solve for x
    x = 14,685,555.91/5,178.46
  6. Step 6: Final answer
    x = 2,835.89

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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.