Home / 20,156.40-30,239.40-8,463.60

Finding the Fourth Proportional to 20,156.40, 30,239.40 and 8,463.60

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Solution

The fourth proportional to 20,156.40, 30,239.40 and 8,463.60 is: 12,697.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.40 : 30,239.40 = 8,463.60 : x
  2. Step 2: Convert to fraction form
    20,156.40/30,239.40 = 8,463.60/x
  3. Step 3: Cross multiply
    20,156.40x = 30,239.40 × 8,463.60
  4. Step 4: Simplify right side
    20,156.40x = 255,934,185.84
  5. Step 5: Solve for x
    x = 255,934,185.84/20,156.40
  6. Step 6: Final answer
    x = 12,697.42

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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.