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Finding the Fourth Proportional to 11,331, 15,636.96 and 6,618.60

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Solution

The fourth proportional to 11,331, 15,636.96 and 6,618.60 is: 9,133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,331 : 15,636.96 = 6,618.60 : x
  2. Step 2: Convert to fraction form
    11,331/15,636.96 = 6,618.60/x
  3. Step 3: Cross multiply
    11,331x = 15,636.96 × 6,618.60
  4. Step 4: Simplify right side
    11,331x = 103,494,783.46
  5. Step 5: Solve for x
    x = 103,494,783.46/11,331
  6. Step 6: Final answer
    x = 9,133.77

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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.