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Finding the Fourth Proportional to 30,894.25, 42,634.17 and 16,747.15

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Solution

The fourth proportional to 30,894.25, 42,634.17 and 16,747.15 is: 23,111.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,894.25 : 42,634.17 = 16,747.15 : x
  2. Step 2: Convert to fraction form
    30,894.25/42,634.17 = 16,747.15/x
  3. Step 3: Cross multiply
    30,894.25x = 42,634.17 × 16,747.15
  4. Step 4: Simplify right side
    30,894.25x = 714,000,840.12
  5. Step 5: Solve for x
    x = 714,000,840.12/30,894.25
  6. Step 6: Final answer
    x = 23,111.12

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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.