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Finding the Fourth Proportional to 18,966.54, 28,453.47 and 7,278.84

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Solution

The fourth proportional to 18,966.54, 28,453.47 and 7,278.84 is: 10,919.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.54 : 28,453.47 = 7,278.84 : x
  2. Step 2: Convert to fraction form
    18,966.54/28,453.47 = 7,278.84/x
  3. Step 3: Cross multiply
    18,966.54x = 28,453.47 × 7,278.84
  4. Step 4: Simplify right side
    18,966.54x = 207,108,255.57
  5. Step 5: Solve for x
    x = 207,108,255.57/18,966.54
  6. Step 6: Final answer
    x = 10,919.66

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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.