Home / 21,179.26-31,771.81-7,143.30

Finding the Fourth Proportional to 21,179.26, 31,771.81 and 7,143.30

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Solution

The fourth proportional to 21,179.26, 31,771.81 and 7,143.30 is: 10,715.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.26 : 31,771.81 = 7,143.30 : x
  2. Step 2: Convert to fraction form
    21,179.26/31,771.81 = 7,143.30/x
  3. Step 3: Cross multiply
    21,179.26x = 31,771.81 × 7,143.30
  4. Step 4: Simplify right side
    21,179.26x = 226,955,570.37
  5. Step 5: Solve for x
    x = 226,955,570.37/21,179.26
  6. Step 6: Final answer
    x = 10,715.93

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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.