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Finding the Fourth Proportional to 30,958.98, 42,722.70 and 16,811.70

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Solution

The fourth proportional to 30,958.98, 42,722.70 and 16,811.70 is: 23,199.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.98 : 42,722.70 = 16,811.70 : x
  2. Step 2: Convert to fraction form
    30,958.98/42,722.70 = 16,811.70/x
  3. Step 3: Cross multiply
    30,958.98x = 42,722.70 × 16,811.70
  4. Step 4: Simplify right side
    30,958.98x = 718,241,215.59
  5. Step 5: Solve for x
    x = 718,241,215.59/30,958.98
  6. Step 6: Final answer
    x = 23,199.77

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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.