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Finding the Fourth Proportional to 30,348.80, 45,515.10 and 9,288.80

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Solution

The fourth proportional to 30,348.80, 45,515.10 and 9,288.80 is: 13,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,348.80 : 45,515.10 = 9,288.80 : x
  2. Step 2: Convert to fraction form
    30,348.80/45,515.10 = 9,288.80/x
  3. Step 3: Cross multiply
    30,348.80x = 45,515.10 × 9,288.80
  4. Step 4: Simplify right side
    30,348.80x = 422,780,660.88
  5. Step 5: Solve for x
    x = 422,780,660.88/30,348.80
  6. Step 6: Final answer
    x = 13,930.72

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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.