Home / 21,895.32-30,215.04-13,396.80

Finding the Fourth Proportional to 21,895.32, 30,215.04 and 13,396.80

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Solution

The fourth proportional to 21,895.32, 30,215.04 and 13,396.80 is: 18,487.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,895.32 : 30,215.04 = 13,396.80 : x
  2. Step 2: Convert to fraction form
    21,895.32/30,215.04 = 13,396.80/x
  3. Step 3: Cross multiply
    21,895.32x = 30,215.04 × 13,396.80
  4. Step 4: Simplify right side
    21,895.32x = 404,784,847.87
  5. Step 5: Solve for x
    x = 404,784,847.87/21,895.32
  6. Step 6: Final answer
    x = 18,487.28

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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.