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Finding the Fourth Proportional to 18,977.64, 28,468.89 and 7,289.34

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Solution

The fourth proportional to 18,977.64, 28,468.89 and 7,289.34 is: 10,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.64 : 28,468.89 = 7,289.34 : x
  2. Step 2: Convert to fraction form
    18,977.64/28,468.89 = 7,289.34/x
  3. Step 3: Cross multiply
    18,977.64x = 28,468.89 × 7,289.34
  4. Step 4: Simplify right side
    18,977.64x = 207,519,418.63
  5. Step 5: Solve for x
    x = 207,519,418.63/18,977.64
  6. Step 6: Final answer
    x = 10,934.94

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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.