Home / 20,627.28-28,480.44-12,680.16

Finding the Fourth Proportional to 20,627.28, 28,480.44 and 12,680.16

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Solution

The fourth proportional to 20,627.28, 28,480.44 and 12,680.16 is: 17,507.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,627.28 : 28,480.44 = 12,680.16 : x
  2. Step 2: Convert to fraction form
    20,627.28/28,480.44 = 12,680.16/x
  3. Step 3: Cross multiply
    20,627.28x = 28,480.44 × 12,680.16
  4. Step 4: Simplify right side
    20,627.28x = 361,136,536.07
  5. Step 5: Solve for x
    x = 361,136,536.07/20,627.28
  6. Step 6: Final answer
    x = 17,507.71

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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.