Home / 7,128.12-9,836.56-3,941.22

Finding the Fourth Proportional to 7,128.12, 9,836.56 and 3,941.22

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Solution

The fourth proportional to 7,128.12, 9,836.56 and 3,941.22 is: 5,438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.12 : 9,836.56 = 3,941.22 : x
  2. Step 2: Convert to fraction form
    7,128.12/9,836.56 = 3,941.22/x
  3. Step 3: Cross multiply
    7,128.12x = 9,836.56 × 3,941.22
  4. Step 4: Simplify right side
    7,128.12x = 38,768,047.00
  5. Step 5: Solve for x
    x = 38,768,047.00/7,128.12
  6. Step 6: Final answer
    x = 5,438.75

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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.