Home / 15,769.78-21,761.30-8,696.26

Finding the Fourth Proportional to 15,769.78, 21,761.30 and 8,696.26

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Solution

The fourth proportional to 15,769.78, 21,761.30 and 8,696.26 is: 12,000.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.78 : 21,761.30 = 8,696.26 : x
  2. Step 2: Convert to fraction form
    15,769.78/21,761.30 = 8,696.26/x
  3. Step 3: Cross multiply
    15,769.78x = 21,761.30 × 8,696.26
  4. Step 4: Simplify right side
    15,769.78x = 189,241,922.74
  5. Step 5: Solve for x
    x = 189,241,922.74/15,769.78
  6. Step 6: Final answer
    x = 12,000.29

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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.