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Finding the Fourth Proportional to 18,996.71, 28,492.90 and 5,144.63

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Solution

The fourth proportional to 18,996.71, 28,492.90 and 5,144.63 is: 7,716.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.71 : 28,492.90 = 5,144.63 : x
  2. Step 2: Convert to fraction form
    18,996.71/28,492.90 = 5,144.63/x
  3. Step 3: Cross multiply
    18,996.71x = 28,492.90 × 5,144.63
  4. Step 4: Simplify right side
    18,996.71x = 146,585,272.80
  5. Step 5: Solve for x
    x = 146,585,272.80/18,996.71
  6. Step 6: Final answer
    x = 7,716.35

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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.