Home / 21,998.32-30,352.44-12,438.40

Finding the Fourth Proportional to 21,998.32, 30,352.44 and 12,438.40

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Solution

The fourth proportional to 21,998.32, 30,352.44 and 12,438.40 is: 17,162.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.32 : 30,352.44 = 12,438.40 : x
  2. Step 2: Convert to fraction form
    21,998.32/30,352.44 = 12,438.40/x
  3. Step 3: Cross multiply
    21,998.32x = 30,352.44 × 12,438.40
  4. Step 4: Simplify right side
    21,998.32x = 377,535,789.70
  5. Step 5: Solve for x
    x = 377,535,789.70/21,998.32
  6. Step 6: Final answer
    x = 17,162.03

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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.