Home / 11,689.56-16,125.60-7,912.86

Finding the Fourth Proportional to 11,689.56, 16,125.60 and 7,912.86

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Solution

The fourth proportional to 11,689.56, 16,125.60 and 7,912.86 is: 10,915.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,689.56 : 16,125.60 = 7,912.86 : x
  2. Step 2: Convert to fraction form
    11,689.56/16,125.60 = 7,912.86/x
  3. Step 3: Cross multiply
    11,689.56x = 16,125.60 × 7,912.86
  4. Step 4: Simplify right side
    11,689.56x = 127,599,615.22
  5. Step 5: Solve for x
    x = 127,599,615.22/11,689.56
  6. Step 6: Final answer
    x = 10,915.69

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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.