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Finding the Fourth Proportional to 15,769.36, 21,761.36 and 8,696.24

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Solution

The fourth proportional to 15,769.36, 21,761.36 and 8,696.24 is: 12,000.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.36 : 21,761.36 = 8,696.24 : x
  2. Step 2: Convert to fraction form
    15,769.36/21,761.36 = 8,696.24/x
  3. Step 3: Cross multiply
    15,769.36x = 21,761.36 × 8,696.24
  4. Step 4: Simplify right side
    15,769.36x = 189,242,009.29
  5. Step 5: Solve for x
    x = 189,242,009.29/15,769.36
  6. Step 6: Final answer
    x = 12,000.61

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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.