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Finding the Fourth Proportional to 18,996.76, 28,475.70 and 9,137.80

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Solution

The fourth proportional to 18,996.76, 28,475.70 and 9,137.80 is: 13,697.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.76 : 28,475.70 = 9,137.80 : x
  2. Step 2: Convert to fraction form
    18,996.76/28,475.70 = 9,137.80/x
  3. Step 3: Cross multiply
    18,996.76x = 28,475.70 × 9,137.80
  4. Step 4: Simplify right side
    18,996.76x = 260,205,251.46
  5. Step 5: Solve for x
    x = 260,205,251.46/18,996.76
  6. Step 6: Final answer
    x = 13,697.35

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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.