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Finding the Fourth Proportional to 11,573.88, 15,979.32 and 8,916.36

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Solution

The fourth proportional to 11,573.88, 15,979.32 and 8,916.36 is: 12,310.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,573.88 : 15,979.32 = 8,916.36 : x
  2. Step 2: Convert to fraction form
    11,573.88/15,979.32 = 8,916.36/x
  3. Step 3: Cross multiply
    11,573.88x = 15,979.32 × 8,916.36
  4. Step 4: Simplify right side
    11,573.88x = 142,477,369.68
  5. Step 5: Solve for x
    x = 142,477,369.68/11,573.88
  6. Step 6: Final answer
    x = 12,310.25

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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.