Home / 7,128.80-10,693.09-1,863.75

Finding the Fourth Proportional to 7,128.80, 10,693.09 and 1,863.75

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Solution

The fourth proportional to 7,128.80, 10,693.09 and 1,863.75 is: 2,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.80 : 10,693.09 = 1,863.75 : x
  2. Step 2: Convert to fraction form
    7,128.80/10,693.09 = 1,863.75/x
  3. Step 3: Cross multiply
    7,128.80x = 10,693.09 × 1,863.75
  4. Step 4: Simplify right side
    7,128.80x = 19,929,246.49
  5. Step 5: Solve for x
    x = 19,929,246.49/7,128.80
  6. Step 6: Final answer
    x = 2,795.60

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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.