Home / 20,440.11-28,209.96-12,480.65

Finding the Fourth Proportional to 20,440.11, 28,209.96 and 12,480.65

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Solution

The fourth proportional to 20,440.11, 28,209.96 and 12,480.65 is: 17,224.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.11 : 28,209.96 = 12,480.65 : x
  2. Step 2: Convert to fraction form
    20,440.11/28,209.96 = 12,480.65/x
  3. Step 3: Cross multiply
    20,440.11x = 28,209.96 × 12,480.65
  4. Step 4: Simplify right side
    20,440.11x = 352,078,637.27
  5. Step 5: Solve for x
    x = 352,078,637.27/20,440.11
  6. Step 6: Final answer
    x = 17,224.89

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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.