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Finding the Fourth Proportional to 18,900.36, 28,358.46 and 9,549

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Solution

The fourth proportional to 18,900.36, 28,358.46 and 9,549 is: 14,327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.36 : 28,358.46 = 9,549 : x
  2. Step 2: Convert to fraction form
    18,900.36/28,358.46 = 9,549/x
  3. Step 3: Cross multiply
    18,900.36x = 28,358.46 × 9,549
  4. Step 4: Simplify right side
    18,900.36x = 270,794,934.54
  5. Step 5: Solve for x
    x = 270,794,934.54/18,900.36
  6. Step 6: Final answer
    x = 14,327.50

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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.