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Finding the Fourth Proportional to 45,305.40, 67,933.80 and 18,980.40

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Solution

The fourth proportional to 45,305.40, 67,933.80 and 18,980.40 is: 28,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,305.40 : 67,933.80 = 18,980.40 : x
  2. Step 2: Convert to fraction form
    45,305.40/67,933.80 = 18,980.40/x
  3. Step 3: Cross multiply
    45,305.40x = 67,933.80 × 18,980.40
  4. Step 4: Simplify right side
    45,305.40x = 1,289,410,697.52
  5. Step 5: Solve for x
    x = 1,289,410,697.52/45,305.40
  6. Step 6: Final answer
    x = 28,460.42

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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.