Home / 20,685.88-30,989.70-12,227.08

Finding the Fourth Proportional to 20,685.88, 30,989.70 and 12,227.08

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Solution

The fourth proportional to 20,685.88, 30,989.70 and 12,227.08 is: 18,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.88 : 30,989.70 = 12,227.08 : x
  2. Step 2: Convert to fraction form
    20,685.88/30,989.70 = 12,227.08/x
  3. Step 3: Cross multiply
    20,685.88x = 30,989.70 × 12,227.08
  4. Step 4: Simplify right side
    20,685.88x = 378,913,541.08
  5. Step 5: Solve for x
    x = 378,913,541.08/20,685.88
  6. Step 6: Final answer
    x = 18,317.50

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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.