Home / 12,808.80-19,215.18-5,412.60

Finding the Fourth Proportional to 12,808.80, 19,215.18 and 5,412.60

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Solution

The fourth proportional to 12,808.80, 19,215.18 and 5,412.60 is: 8,119.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.80 : 19,215.18 = 5,412.60 : x
  2. Step 2: Convert to fraction form
    12,808.80/19,215.18 = 5,412.60/x
  3. Step 3: Cross multiply
    12,808.80x = 19,215.18 × 5,412.60
  4. Step 4: Simplify right side
    12,808.80x = 104,004,083.27
  5. Step 5: Solve for x
    x = 104,004,083.27/12,808.80
  6. Step 6: Final answer
    x = 8,119.74

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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.