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Finding the Fourth Proportional to 11,969.86, 17,915.65 and 8,806.45

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Solution

The fourth proportional to 11,969.86, 17,915.65 and 8,806.45 is: 13,180.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,969.86 : 17,915.65 = 8,806.45 : x
  2. Step 2: Convert to fraction form
    11,969.86/17,915.65 = 8,806.45/x
  3. Step 3: Cross multiply
    11,969.86x = 17,915.65 × 8,806.45
  4. Step 4: Simplify right side
    11,969.86x = 157,773,275.94
  5. Step 5: Solve for x
    x = 157,773,275.94/11,969.86
  6. Step 6: Final answer
    x = 13,180.88

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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.