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Finding the Fourth Proportional to 20,254.71, 27,943.70 and 12,687.87

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Solution

The fourth proportional to 20,254.71, 27,943.70 and 12,687.87 is: 17,504.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,254.71 : 27,943.70 = 12,687.87 : x
  2. Step 2: Convert to fraction form
    20,254.71/27,943.70 = 12,687.87/x
  3. Step 3: Cross multiply
    20,254.71x = 27,943.70 × 12,687.87
  4. Step 4: Simplify right side
    20,254.71x = 354,545,969.48
  5. Step 5: Solve for x
    x = 354,545,969.48/20,254.71
  6. Step 6: Final answer
    x = 17,504.37

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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.