Home / 4,765.80-7,152.40-3,121.88

Finding the Fourth Proportional to 4,765.80, 7,152.40 and 3,121.88

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Solution

The fourth proportional to 4,765.80, 7,152.40 and 3,121.88 is: 4,685.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,765.80 : 7,152.40 = 3,121.88 : x
  2. Step 2: Convert to fraction form
    4,765.80/7,152.40 = 3,121.88/x
  3. Step 3: Cross multiply
    4,765.80x = 7,152.40 × 3,121.88
  4. Step 4: Simplify right side
    4,765.80x = 22,328,934.51
  5. Step 5: Solve for x
    x = 22,328,934.51/4,765.80
  6. Step 6: Final answer
    x = 4,685.24

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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.