Home / 20,135.20-30,227.10-19,989.40

Finding the Fourth Proportional to 20,135.20, 30,227.10 and 19,989.40

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Solution

The fourth proportional to 20,135.20, 30,227.10 and 19,989.40 is: 30,008.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.20 : 30,227.10 = 19,989.40 : x
  2. Step 2: Convert to fraction form
    20,135.20/30,227.10 = 19,989.40/x
  3. Step 3: Cross multiply
    20,135.20x = 30,227.10 × 19,989.40
  4. Step 4: Simplify right side
    20,135.20x = 604,221,592.74
  5. Step 5: Solve for x
    x = 604,221,592.74/20,135.20
  6. Step 6: Final answer
    x = 30,008.22

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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.