Home / 4,995.12-6,890.04-3,128.88

Finding the Fourth Proportional to 4,995.12, 6,890.04 and 3,128.88

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Solution

The fourth proportional to 4,995.12, 6,890.04 and 3,128.88 is: 4,315.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,995.12 : 6,890.04 = 3,128.88 : x
  2. Step 2: Convert to fraction form
    4,995.12/6,890.04 = 3,128.88/x
  3. Step 3: Cross multiply
    4,995.12x = 6,890.04 × 3,128.88
  4. Step 4: Simplify right side
    4,995.12x = 21,558,108.36
  5. Step 5: Solve for x
    x = 21,558,108.36/4,995.12
  6. Step 6: Final answer
    x = 4,315.83

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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.