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Finding the Fourth Proportional to 13,674.40, 18,860.52 and 8,085.40

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Solution

The fourth proportional to 13,674.40, 18,860.52 and 8,085.40 is: 11,151.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,674.40 : 18,860.52 = 8,085.40 : x
  2. Step 2: Convert to fraction form
    13,674.40/18,860.52 = 8,085.40/x
  3. Step 3: Cross multiply
    13,674.40x = 18,860.52 × 8,085.40
  4. Step 4: Simplify right side
    13,674.40x = 152,494,848.41
  5. Step 5: Solve for x
    x = 152,494,848.41/13,674.40
  6. Step 6: Final answer
    x = 11,151.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.