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Finding the Fourth Proportional to 27,643.70, 38,123.01 and 20,491.44

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Solution

The fourth proportional to 27,643.70, 38,123.01 and 20,491.44 is: 28,259.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,643.70 : 38,123.01 = 20,491.44 : x
  2. Step 2: Convert to fraction form
    27,643.70/38,123.01 = 20,491.44/x
  3. Step 3: Cross multiply
    27,643.70x = 38,123.01 × 20,491.44
  4. Step 4: Simplify right side
    27,643.70x = 781,195,270.29
  5. Step 5: Solve for x
    x = 781,195,270.29/27,643.70
  6. Step 6: Final answer
    x = 28,259.43

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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.