Home / 30,811.50-42,519.89-16,664.34

Finding the Fourth Proportional to 30,811.50, 42,519.89 and 16,664.34

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Solution

The fourth proportional to 30,811.50, 42,519.89 and 16,664.34 is: 22,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.50 : 42,519.89 = 16,664.34 : x
  2. Step 2: Convert to fraction form
    30,811.50/42,519.89 = 16,664.34/x
  3. Step 3: Cross multiply
    30,811.50x = 42,519.89 × 16,664.34
  4. Step 4: Simplify right side
    30,811.50x = 708,565,820.40
  5. Step 5: Solve for x
    x = 708,565,820.40/30,811.50
  6. Step 6: Final answer
    x = 22,996.80

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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.