Home / 20,489.76-30,697.56-9,405.72

Finding the Fourth Proportional to 20,489.76, 30,697.56 and 9,405.72

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Solution

The fourth proportional to 20,489.76, 30,697.56 and 9,405.72 is: 14,091.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.76 : 30,697.56 = 9,405.72 : x
  2. Step 2: Convert to fraction form
    20,489.76/30,697.56 = 9,405.72/x
  3. Step 3: Cross multiply
    20,489.76x = 30,697.56 × 9,405.72
  4. Step 4: Simplify right side
    20,489.76x = 288,732,654.04
  5. Step 5: Solve for x
    x = 288,732,654.04/20,489.76
  6. Step 6: Final answer
    x = 14,091.56

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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.