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Finding the Fourth Proportional to 18,756.88, 28,127.11 and 8,898.97

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Solution

The fourth proportional to 18,756.88, 28,127.11 and 8,898.97 is: 13,344.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.88 : 28,127.11 = 8,898.97 : x
  2. Step 2: Convert to fraction form
    18,756.88/28,127.11 = 8,898.97/x
  3. Step 3: Cross multiply
    18,756.88x = 28,127.11 × 8,898.97
  4. Step 4: Simplify right side
    18,756.88x = 250,302,308.08
  5. Step 5: Solve for x
    x = 250,302,308.08/18,756.88
  6. Step 6: Final answer
    x = 13,344.56

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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.