Home / 11,915.10-16,442.76-6,609.90

Finding the Fourth Proportional to 11,915.10, 16,442.76 and 6,609.90

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Solution

The fourth proportional to 11,915.10, 16,442.76 and 6,609.90 is: 9,121.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.10 : 16,442.76 = 6,609.90 : x
  2. Step 2: Convert to fraction form
    11,915.10/16,442.76 = 6,609.90/x
  3. Step 3: Cross multiply
    11,915.10x = 16,442.76 × 6,609.90
  4. Step 4: Simplify right side
    11,915.10x = 108,684,999.32
  5. Step 5: Solve for x
    x = 108,684,999.32/11,915.10
  6. Step 6: Final answer
    x = 9,121.62

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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.