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Finding the Fourth Proportional to 8,696.80, 11,996.12 and 5,157.50

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Solution

The fourth proportional to 8,696.80, 11,996.12 and 5,157.50 is: 7,114.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,696.80 : 11,996.12 = 5,157.50 : x
  2. Step 2: Convert to fraction form
    8,696.80/11,996.12 = 5,157.50/x
  3. Step 3: Cross multiply
    8,696.80x = 11,996.12 × 5,157.50
  4. Step 4: Simplify right side
    8,696.80x = 61,869,963.11
  5. Step 5: Solve for x
    x = 61,869,963.11/8,696.80
  6. Step 6: Final answer
    x = 7,114.11

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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.