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Finding the Fourth Proportional to 30,945.99, 42,705.17 and 16,798.82

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Solution

The fourth proportional to 30,945.99, 42,705.17 and 16,798.82 is: 23,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,945.99 : 42,705.17 = 16,798.82 : x
  2. Step 2: Convert to fraction form
    30,945.99/42,705.17 = 16,798.82/x
  3. Step 3: Cross multiply
    30,945.99x = 42,705.17 × 16,798.82
  4. Step 4: Simplify right side
    30,945.99x = 717,396,463.90
  5. Step 5: Solve for x
    x = 717,396,463.90/30,945.99
  6. Step 6: Final answer
    x = 23,182.21

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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.