Home / 12,816.60-19,239.30-9,907.80

Finding the Fourth Proportional to 12,816.60, 19,239.30 and 9,907.80

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Solution

The fourth proportional to 12,816.60, 19,239.30 and 9,907.80 is: 14,872.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.60 : 19,239.30 = 9,907.80 : x
  2. Step 2: Convert to fraction form
    12,816.60/19,239.30 = 9,907.80/x
  3. Step 3: Cross multiply
    12,816.60x = 19,239.30 × 9,907.80
  4. Step 4: Simplify right side
    12,816.60x = 190,619,136.54
  5. Step 5: Solve for x
    x = 190,619,136.54/12,816.60
  6. Step 6: Final answer
    x = 14,872.83

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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.