Home / 21,212.82-31,789.14-15,622.32

Finding the Fourth Proportional to 21,212.82, 31,789.14 and 15,622.32

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Solution

The fourth proportional to 21,212.82, 31,789.14 and 15,622.32 is: 23,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.82 : 31,789.14 = 15,622.32 : x
  2. Step 2: Convert to fraction form
    21,212.82/31,789.14 = 15,622.32/x
  3. Step 3: Cross multiply
    21,212.82x = 31,789.14 × 15,622.32
  4. Step 4: Simplify right side
    21,212.82x = 496,620,117.60
  5. Step 5: Solve for x
    x = 496,620,117.60/21,212.82
  6. Step 6: Final answer
    x = 23,411.32

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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.