Home / 7,128.07-9,835.63-3,983.65

Finding the Fourth Proportional to 7,128.07, 9,835.63 and 3,983.65

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Solution

The fourth proportional to 7,128.07, 9,835.63 and 3,983.65 is: 5,496.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.07 : 9,835.63 = 3,983.65 : x
  2. Step 2: Convert to fraction form
    7,128.07/9,835.63 = 3,983.65/x
  3. Step 3: Cross multiply
    7,128.07x = 9,835.63 × 3,983.65
  4. Step 4: Simplify right side
    7,128.07x = 39,181,707.45
  5. Step 5: Solve for x
    x = 39,181,707.45/7,128.07
  6. Step 6: Final answer
    x = 5,496.82

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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.