Home / 21,580.65-29,785.43-12,149.21

Finding the Fourth Proportional to 21,580.65, 29,785.43 and 12,149.21

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Solution

The fourth proportional to 21,580.65, 29,785.43 and 12,149.21 is: 16,768.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,580.65 : 29,785.43 = 12,149.21 : x
  2. Step 2: Convert to fraction form
    21,580.65/29,785.43 = 12,149.21/x
  3. Step 3: Cross multiply
    21,580.65x = 29,785.43 × 12,149.21
  4. Step 4: Simplify right side
    21,580.65x = 361,869,346.03
  5. Step 5: Solve for x
    x = 361,869,346.03/21,580.65
  6. Step 6: Final answer
    x = 16,768.23

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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.