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Finding the Fourth Proportional to 4,518.11, 6,780.05 and 1,921.05

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Solution

The fourth proportional to 4,518.11, 6,780.05 and 1,921.05 is: 2,882.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,518.11 : 6,780.05 = 1,921.05 : x
  2. Step 2: Convert to fraction form
    4,518.11/6,780.05 = 1,921.05/x
  3. Step 3: Cross multiply
    4,518.11x = 6,780.05 × 1,921.05
  4. Step 4: Simplify right side
    4,518.11x = 13,024,805.45
  5. Step 5: Solve for x
    x = 13,024,805.45/4,518.11
  6. Step 6: Final answer
    x = 2,882.80

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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.