Home / 13,439.67-20,156.80-8,439.81

Finding the Fourth Proportional to 13,439.67, 20,156.80 and 8,439.81

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Solution

The fourth proportional to 13,439.67, 20,156.80 and 8,439.81 is: 12,658.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.67 : 20,156.80 = 8,439.81 : x
  2. Step 2: Convert to fraction form
    13,439.67/20,156.80 = 8,439.81/x
  3. Step 3: Cross multiply
    13,439.67x = 20,156.80 × 8,439.81
  4. Step 4: Simplify right side
    13,439.67x = 170,119,562.21
  5. Step 5: Solve for x
    x = 170,119,562.21/13,439.67
  6. Step 6: Final answer
    x = 12,658.02

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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.