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Finding the Fourth Proportional to 30,879.53, 42,608.13 and 17,267.82

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Solution

The fourth proportional to 30,879.53, 42,608.13 and 17,267.82 is: 23,826.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.53 : 42,608.13 = 17,267.82 : x
  2. Step 2: Convert to fraction form
    30,879.53/42,608.13 = 17,267.82/x
  3. Step 3: Cross multiply
    30,879.53x = 42,608.13 × 17,267.82
  4. Step 4: Simplify right side
    30,879.53x = 735,749,519.38
  5. Step 5: Solve for x
    x = 735,749,519.38/30,879.53
  6. Step 6: Final answer
    x = 23,826.45

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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.