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Finding the Fourth Proportional to 30,612.60, 45,902.70 and 10,891.80

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Solution

The fourth proportional to 30,612.60, 45,902.70 and 10,891.80 is: 16,331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,612.60 : 45,902.70 = 10,891.80 : x
  2. Step 2: Convert to fraction form
    30,612.60/45,902.70 = 10,891.80/x
  3. Step 3: Cross multiply
    30,612.60x = 45,902.70 × 10,891.80
  4. Step 4: Simplify right side
    30,612.60x = 499,963,027.86
  5. Step 5: Solve for x
    x = 499,963,027.86/30,612.60
  6. Step 6: Final answer
    x = 16,331.94

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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.