Home / 20,385.12-30,580.73-7,236.39

Finding the Fourth Proportional to 20,385.12, 30,580.73 and 7,236.39

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Solution

The fourth proportional to 20,385.12, 30,580.73 and 7,236.39 is: 10,855.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.12 : 30,580.73 = 7,236.39 : x
  2. Step 2: Convert to fraction form
    20,385.12/30,580.73 = 7,236.39/x
  3. Step 3: Cross multiply
    20,385.12x = 30,580.73 × 7,236.39
  4. Step 4: Simplify right side
    20,385.12x = 221,294,088.76
  5. Step 5: Solve for x
    x = 221,294,088.76/20,385.12
  6. Step 6: Final answer
    x = 10,855.67

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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.