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Finding the Fourth Proportional to 18,680.70, 27,938.43 and 16,615.20

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Solution

The fourth proportional to 18,680.70, 27,938.43 and 16,615.20 is: 24,849.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.70 : 27,938.43 = 16,615.20 : x
  2. Step 2: Convert to fraction form
    18,680.70/27,938.43 = 16,615.20/x
  3. Step 3: Cross multiply
    18,680.70x = 27,938.43 × 16,615.20
  4. Step 4: Simplify right side
    18,680.70x = 464,202,602.14
  5. Step 5: Solve for x
    x = 464,202,602.14/18,680.70
  6. Step 6: Final answer
    x = 24,849.32

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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.