Home / 15,439.28-21,306.26-8,365.68

Finding the Fourth Proportional to 15,439.28, 21,306.26 and 8,365.68

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Solution

The fourth proportional to 15,439.28, 21,306.26 and 8,365.68 is: 11,544.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.28 : 21,306.26 = 8,365.68 : x
  2. Step 2: Convert to fraction form
    15,439.28/21,306.26 = 8,365.68/x
  3. Step 3: Cross multiply
    15,439.28x = 21,306.26 × 8,365.68
  4. Step 4: Simplify right side
    15,439.28x = 178,241,311.33
  5. Step 5: Solve for x
    x = 178,241,311.33/15,439.28
  6. Step 6: Final answer
    x = 11,544.67

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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.