Home / 20,358.42-28,096.32-11,405.76

Finding the Fourth Proportional to 20,358.42, 28,096.32 and 11,405.76

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Solution

The fourth proportional to 20,358.42, 28,096.32 and 11,405.76 is: 15,740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.42 : 28,096.32 = 11,405.76 : x
  2. Step 2: Convert to fraction form
    20,358.42/28,096.32 = 11,405.76/x
  3. Step 3: Cross multiply
    20,358.42x = 28,096.32 × 11,405.76
  4. Step 4: Simplify right side
    20,358.42x = 320,459,882.80
  5. Step 5: Solve for x
    x = 320,459,882.80/20,358.42
  6. Step 6: Final answer
    x = 15,740.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.