Home / 18,910.20-28,365.30-12,257.40

Finding the Fourth Proportional to 18,910.20, 28,365.30 and 12,257.40

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Solution

The fourth proportional to 18,910.20, 28,365.30 and 12,257.40 is: 18,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.20 : 28,365.30 = 12,257.40 : x
  2. Step 2: Convert to fraction form
    18,910.20/28,365.30 = 12,257.40/x
  3. Step 3: Cross multiply
    18,910.20x = 28,365.30 × 12,257.40
  4. Step 4: Simplify right side
    18,910.20x = 347,684,828.22
  5. Step 5: Solve for x
    x = 347,684,828.22/18,910.20
  6. Step 6: Final answer
    x = 18,386.10

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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.