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Finding the Fourth Proportional to 30,211.50, 45,305.68 and 9,943.50

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Solution

The fourth proportional to 30,211.50, 45,305.68 and 9,943.50 is: 14,911.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,211.50 : 45,305.68 = 9,943.50 : x
  2. Step 2: Convert to fraction form
    30,211.50/45,305.68 = 9,943.50/x
  3. Step 3: Cross multiply
    30,211.50x = 45,305.68 × 9,943.50
  4. Step 4: Simplify right side
    30,211.50x = 450,497,029.08
  5. Step 5: Solve for x
    x = 450,497,029.08/30,211.50
  6. Step 6: Final answer
    x = 14,911.44

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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.