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Finding the Fourth Proportional to 27,286.80, 40,930.20 and 14,143.20

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Solution

The fourth proportional to 27,286.80, 40,930.20 and 14,143.20 is: 21,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,286.80 : 40,930.20 = 14,143.20 : x
  2. Step 2: Convert to fraction form
    27,286.80/40,930.20 = 14,143.20/x
  3. Step 3: Cross multiply
    27,286.80x = 40,930.20 × 14,143.20
  4. Step 4: Simplify right side
    27,286.80x = 578,884,004.64
  5. Step 5: Solve for x
    x = 578,884,004.64/27,286.80
  6. Step 6: Final answer
    x = 21,214.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.