Home / 20,121.60-30,063.28-19,432.56

Finding the Fourth Proportional to 20,121.60, 30,063.28 and 19,432.56

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Solution

The fourth proportional to 20,121.60, 30,063.28 and 19,432.56 is: 29,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.60 : 30,063.28 = 19,432.56 : x
  2. Step 2: Convert to fraction form
    20,121.60/30,063.28 = 19,432.56/x
  3. Step 3: Cross multiply
    20,121.60x = 30,063.28 × 19,432.56
  4. Step 4: Simplify right side
    20,121.60x = 584,206,492.40
  5. Step 5: Solve for x
    x = 584,206,492.40/20,121.60
  6. Step 6: Final answer
    x = 29,033.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.