Home / 21,322.20-31,940.10-12,077.40

Finding the Fourth Proportional to 21,322.20, 31,940.10 and 12,077.40

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Solution

The fourth proportional to 21,322.20, 31,940.10 and 12,077.40 is: 18,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.20 : 31,940.10 = 12,077.40 : x
  2. Step 2: Convert to fraction form
    21,322.20/31,940.10 = 12,077.40/x
  3. Step 3: Cross multiply
    21,322.20x = 31,940.10 × 12,077.40
  4. Step 4: Simplify right side
    21,322.20x = 385,753,363.74
  5. Step 5: Solve for x
    x = 385,753,363.74/21,322.20
  6. Step 6: Final answer
    x = 18,091.63

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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.