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Finding the Fourth Proportional to 19,790.76, 29,685.42 and 5,939.40

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Solution

The fourth proportional to 19,790.76, 29,685.42 and 5,939.40 is: 8,908.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.76 : 29,685.42 = 5,939.40 : x
  2. Step 2: Convert to fraction form
    19,790.76/29,685.42 = 5,939.40/x
  3. Step 3: Cross multiply
    19,790.76x = 29,685.42 × 5,939.40
  4. Step 4: Simplify right side
    19,790.76x = 176,313,583.55
  5. Step 5: Solve for x
    x = 176,313,583.55/19,790.76
  6. Step 6: Final answer
    x = 8,908.88

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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.