Home / 21,143.36-31,711.68-7,101.92

Finding the Fourth Proportional to 21,143.36, 31,711.68 and 7,101.92

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Solution

The fourth proportional to 21,143.36, 31,711.68 and 7,101.92 is: 10,651.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.36 : 31,711.68 = 7,101.92 : x
  2. Step 2: Convert to fraction form
    21,143.36/31,711.68 = 7,101.92/x
  3. Step 3: Cross multiply
    21,143.36x = 31,711.68 × 7,101.92
  4. Step 4: Simplify right side
    21,143.36x = 225,213,814.43
  5. Step 5: Solve for x
    x = 225,213,814.43/21,143.36
  6. Step 6: Final answer
    x = 10,651.75

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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.