Home / 13,421.34-20,134.78-5,099.81

Finding the Fourth Proportional to 13,421.34, 20,134.78 and 5,099.81

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Solution

The fourth proportional to 13,421.34, 20,134.78 and 5,099.81 is: 7,650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.34 : 20,134.78 = 5,099.81 : x
  2. Step 2: Convert to fraction form
    13,421.34/20,134.78 = 5,099.81/x
  3. Step 3: Cross multiply
    13,421.34x = 20,134.78 × 5,099.81
  4. Step 4: Simplify right side
    13,421.34x = 102,683,438.97
  5. Step 5: Solve for x
    x = 102,683,438.97/13,421.34
  6. Step 6: Final answer
    x = 7,650.76

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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.