Home / 20,355.70-30,690.53-20,229.34

Finding the Fourth Proportional to 20,355.70, 30,690.53 and 20,229.34

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Solution

The fourth proportional to 20,355.70, 30,690.53 and 20,229.34 is: 30,500.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.70 : 30,690.53 = 20,229.34 : x
  2. Step 2: Convert to fraction form
    20,355.70/30,690.53 = 20,229.34/x
  3. Step 3: Cross multiply
    20,355.70x = 30,690.53 × 20,229.34
  4. Step 4: Simplify right side
    20,355.70x = 620,849,166.15
  5. Step 5: Solve for x
    x = 620,849,166.15/20,355.70
  6. Step 6: Final answer
    x = 30,500.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.