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Finding the Fourth Proportional to 30,796.80, 42,508.80 and 19,622.40

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Solution

The fourth proportional to 30,796.80, 42,508.80 and 19,622.40 is: 27,084.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,796.80 : 42,508.80 = 19,622.40 : x
  2. Step 2: Convert to fraction form
    30,796.80/42,508.80 = 19,622.40/x
  3. Step 3: Cross multiply
    30,796.80x = 42,508.80 × 19,622.40
  4. Step 4: Simplify right side
    30,796.80x = 834,124,677.12
  5. Step 5: Solve for x
    x = 834,124,677.12/30,796.80
  6. Step 6: Final answer
    x = 27,084.78

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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.