Home / 7,128.13-9,834.40-4,141.50

Finding the Fourth Proportional to 7,128.13, 9,834.40 and 4,141.50

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Solution

The fourth proportional to 7,128.13, 9,834.40 and 4,141.50 is: 5,713.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.13 : 9,834.40 = 4,141.50 : x
  2. Step 2: Convert to fraction form
    7,128.13/9,834.40 = 4,141.50/x
  3. Step 3: Cross multiply
    7,128.13x = 9,834.40 × 4,141.50
  4. Step 4: Simplify right side
    7,128.13x = 40,729,167.60
  5. Step 5: Solve for x
    x = 40,729,167.60/7,128.13
  6. Step 6: Final answer
    x = 5,713.86

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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.