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Finding the Fourth Proportional to 28,102.70, 38,789.80 and 18,549.56

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Solution

The fourth proportional to 28,102.70, 38,789.80 and 18,549.56 is: 25,603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.70 : 38,789.80 = 18,549.56 : x
  2. Step 2: Convert to fraction form
    28,102.70/38,789.80 = 18,549.56/x
  3. Step 3: Cross multiply
    28,102.70x = 38,789.80 × 18,549.56
  4. Step 4: Simplify right side
    28,102.70x = 719,533,528.54
  5. Step 5: Solve for x
    x = 719,533,528.54/28,102.70
  6. Step 6: Final answer
    x = 25,603.72

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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.