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Finding the Fourth Proportional to 14,600.88, 20,143.80 and 10,128.60

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Solution

The fourth proportional to 14,600.88, 20,143.80 and 10,128.60 is: 13,973.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,600.88 : 20,143.80 = 10,128.60 : x
  2. Step 2: Convert to fraction form
    14,600.88/20,143.80 = 10,128.60/x
  3. Step 3: Cross multiply
    14,600.88x = 20,143.80 × 10,128.60
  4. Step 4: Simplify right side
    14,600.88x = 204,028,492.68
  5. Step 5: Solve for x
    x = 204,028,492.68/14,600.88
  6. Step 6: Final answer
    x = 13,973.71

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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.