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Finding the Fourth Proportional to 30,790.70, 42,489.87 and 17,363.21

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Solution

The fourth proportional to 30,790.70, 42,489.87 and 17,363.21 is: 23,960.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,790.70 : 42,489.87 = 17,363.21 : x
  2. Step 2: Convert to fraction form
    30,790.70/42,489.87 = 17,363.21/x
  3. Step 3: Cross multiply
    30,790.70x = 42,489.87 × 17,363.21
  4. Step 4: Simplify right side
    30,790.70x = 737,760,497.13
  5. Step 5: Solve for x
    x = 737,760,497.13/30,790.70
  6. Step 6: Final answer
    x = 23,960.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.