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Finding the Fourth Proportional to 30,353.91, 45,503.13 and 10,621.70

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Solution

The fourth proportional to 30,353.91, 45,503.13 and 10,621.70 is: 15,922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,353.91 : 45,503.13 = 10,621.70 : x
  2. Step 2: Convert to fraction form
    30,353.91/45,503.13 = 10,621.70/x
  3. Step 3: Cross multiply
    30,353.91x = 45,503.13 × 10,621.70
  4. Step 4: Simplify right side
    30,353.91x = 483,320,709.68
  5. Step 5: Solve for x
    x = 483,320,709.68/30,353.91
  6. Step 6: Final answer
    x = 15,922.85

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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.