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Finding the Fourth Proportional to 18,658.20, 27,938.70 and 17,783.40

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Solution

The fourth proportional to 18,658.20, 27,938.70 and 17,783.40 is: 26,628.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.20 : 27,938.70 = 17,783.40 : x
  2. Step 2: Convert to fraction form
    18,658.20/27,938.70 = 17,783.40/x
  3. Step 3: Cross multiply
    18,658.20x = 27,938.70 × 17,783.40
  4. Step 4: Simplify right side
    18,658.20x = 496,845,077.58
  5. Step 5: Solve for x
    x = 496,845,077.58/18,658.20
  6. Step 6: Final answer
    x = 26,628.78

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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.