Home / 12,276.40-18,436.20-11,887.60

Finding the Fourth Proportional to 12,276.40, 18,436.20 and 11,887.60

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Solution

The fourth proportional to 12,276.40, 18,436.20 and 11,887.60 is: 17,852.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,276.40 : 18,436.20 = 11,887.60 : x
  2. Step 2: Convert to fraction form
    12,276.40/18,436.20 = 11,887.60/x
  3. Step 3: Cross multiply
    12,276.40x = 18,436.20 × 11,887.60
  4. Step 4: Simplify right side
    12,276.40x = 219,162,171.12
  5. Step 5: Solve for x
    x = 219,162,171.12/12,276.40
  6. Step 6: Final answer
    x = 17,852.32

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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.