Home / 13,664.40-18,863.98-9,211.56

Finding the Fourth Proportional to 13,664.40, 18,863.98 and 9,211.56

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Solution

The fourth proportional to 13,664.40, 18,863.98 and 9,211.56 is: 12,716.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.40 : 18,863.98 = 9,211.56 : x
  2. Step 2: Convert to fraction form
    13,664.40/18,863.98 = 9,211.56/x
  3. Step 3: Cross multiply
    13,664.40x = 18,863.98 × 9,211.56
  4. Step 4: Simplify right side
    13,664.40x = 173,766,683.61
  5. Step 5: Solve for x
    x = 173,766,683.61/13,664.40
  6. Step 6: Final answer
    x = 12,716.74

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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.