Home / 12,855.20-19,282.80-12,077.60

Finding the Fourth Proportional to 12,855.20, 19,282.80 and 12,077.60

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Solution

The fourth proportional to 12,855.20, 19,282.80 and 12,077.60 is: 18,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.20 : 19,282.80 = 12,077.60 : x
  2. Step 2: Convert to fraction form
    12,855.20/19,282.80 = 12,077.60/x
  3. Step 3: Cross multiply
    12,855.20x = 19,282.80 × 12,077.60
  4. Step 4: Simplify right side
    12,855.20x = 232,889,945.28
  5. Step 5: Solve for x
    x = 232,889,945.28/12,855.20
  6. Step 6: Final answer
    x = 18,116.40

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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.