Home / 18,156.85-27,218.86-12,612.80

Finding the Fourth Proportional to 18,156.85, 27,218.86 and 12,612.80

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Solution

The fourth proportional to 18,156.85, 27,218.86 and 12,612.80 is: 18,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,156.85 : 27,218.86 = 12,612.80 : x
  2. Step 2: Convert to fraction form
    18,156.85/27,218.86 = 12,612.80/x
  3. Step 3: Cross multiply
    18,156.85x = 27,218.86 × 12,612.80
  4. Step 4: Simplify right side
    18,156.85x = 343,306,037.41
  5. Step 5: Solve for x
    x = 343,306,037.41/18,156.85
  6. Step 6: Final answer
    x = 18,907.80

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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.