Home / 30,811.87-42,520.40-16,664.71

Finding the Fourth Proportional to 30,811.87, 42,520.40 and 16,664.71

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Solution

The fourth proportional to 30,811.87, 42,520.40 and 16,664.71 is: 22,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.87 : 42,520.40 = 16,664.71 : x
  2. Step 2: Convert to fraction form
    30,811.87/42,520.40 = 16,664.71/x
  3. Step 3: Cross multiply
    30,811.87x = 42,520.40 × 16,664.71
  4. Step 4: Simplify right side
    30,811.87x = 708,589,839.16
  5. Step 5: Solve for x
    x = 708,589,839.16/30,811.87
  6. Step 6: Final answer
    x = 22,997.30

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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.