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Finding the Fourth Proportional to 30,657.87, 45,990.41 and 10,939.23

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Solution

The fourth proportional to 30,657.87, 45,990.41 and 10,939.23 is: 16,410.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,657.87 : 45,990.41 = 10,939.23 : x
  2. Step 2: Convert to fraction form
    30,657.87/45,990.41 = 10,939.23/x
  3. Step 3: Cross multiply
    30,657.87x = 45,990.41 × 10,939.23
  4. Step 4: Simplify right side
    30,657.87x = 503,099,618.09
  5. Step 5: Solve for x
    x = 503,099,618.09/30,657.87
  6. Step 6: Final answer
    x = 16,410.13

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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.