Home / 21,789.87-30,069.14-12,358.23

Finding the Fourth Proportional to 21,789.87, 30,069.14 and 12,358.23

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Solution

The fourth proportional to 21,789.87, 30,069.14 and 12,358.23 is: 17,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.87 : 30,069.14 = 12,358.23 : x
  2. Step 2: Convert to fraction form
    21,789.87/30,069.14 = 12,358.23/x
  3. Step 3: Cross multiply
    21,789.87x = 30,069.14 × 12,358.23
  4. Step 4: Simplify right side
    21,789.87x = 371,601,286.23
  5. Step 5: Solve for x
    x = 371,601,286.23/21,789.87
  6. Step 6: Final answer
    x = 17,053.86

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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.