Home / 21,220.65-29,282.55-12,268.09

Finding the Fourth Proportional to 21,220.65, 29,282.55 and 12,268.09

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Solution

The fourth proportional to 21,220.65, 29,282.55 and 12,268.09 is: 16,928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.65 : 29,282.55 = 12,268.09 : x
  2. Step 2: Convert to fraction form
    21,220.65/29,282.55 = 12,268.09/x
  3. Step 3: Cross multiply
    21,220.65x = 29,282.55 × 12,268.09
  4. Step 4: Simplify right side
    21,220.65x = 359,240,949.43
  5. Step 5: Solve for x
    x = 359,240,949.43/21,220.65
  6. Step 6: Final answer
    x = 16,928.84

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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.