Home / 4,872.30-7,315.20-3,128.10

Finding the Fourth Proportional to 4,872.30, 7,315.20 and 3,128.10

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Solution

The fourth proportional to 4,872.30, 7,315.20 and 3,128.10 is: 4,696.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,872.30 : 7,315.20 = 3,128.10 : x
  2. Step 2: Convert to fraction form
    4,872.30/7,315.20 = 3,128.10/x
  3. Step 3: Cross multiply
    4,872.30x = 7,315.20 × 3,128.10
  4. Step 4: Simplify right side
    4,872.30x = 22,882,677.12
  5. Step 5: Solve for x
    x = 22,882,677.12/4,872.30
  6. Step 6: Final answer
    x = 4,696.48

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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.