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Finding the Fourth Proportional to 20,005.30, 30,007.95 and 19,713.70

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Solution

The fourth proportional to 20,005.30, 30,007.95 and 19,713.70 is: 29,570.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.30 : 30,007.95 = 19,713.70 : x
  2. Step 2: Convert to fraction form
    20,005.30/30,007.95 = 19,713.70/x
  3. Step 3: Cross multiply
    20,005.30x = 30,007.95 × 19,713.70
  4. Step 4: Simplify right side
    20,005.30x = 591,567,723.92
  5. Step 5: Solve for x
    x = 591,567,723.92/20,005.30
  6. Step 6: Final answer
    x = 29,570.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.