Home / 21,899-30,220.65-12,467.56

Finding the Fourth Proportional to 21,899, 30,220.65 and 12,467.56

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Solution

The fourth proportional to 21,899, 30,220.65 and 12,467.56 is: 17,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899 : 30,220.65 = 12,467.56 : x
  2. Step 2: Convert to fraction form
    21,899/30,220.65 = 12,467.56/x
  3. Step 3: Cross multiply
    21,899x = 30,220.65 × 12,467.56
  4. Step 4: Simplify right side
    21,899x = 376,777,767.11
  5. Step 5: Solve for x
    x = 376,777,767.11/21,899
  6. Step 6: Final answer
    x = 17,205.25

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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.