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Finding the Fourth Proportional to 11,955.87, 17,916.80 and 8,811.18

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Solution

The fourth proportional to 11,955.87, 17,916.80 and 8,811.18 is: 13,204.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,955.87 : 17,916.80 = 8,811.18 : x
  2. Step 2: Convert to fraction form
    11,955.87/17,916.80 = 8,811.18/x
  3. Step 3: Cross multiply
    11,955.87x = 17,916.80 × 8,811.18
  4. Step 4: Simplify right side
    11,955.87x = 157,868,105.77
  5. Step 5: Solve for x
    x = 157,868,105.77/11,955.87
  6. Step 6: Final answer
    x = 13,204.23

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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.