Home / 15,769.98-21,771-12,359.97

Finding the Fourth Proportional to 15,769.98, 21,771 and 12,359.97

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Solution

The fourth proportional to 15,769.98, 21,771 and 12,359.97 is: 17,063.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.98 : 21,771 = 12,359.97 : x
  2. Step 2: Convert to fraction form
    15,769.98/21,771 = 12,359.97/x
  3. Step 3: Cross multiply
    15,769.98x = 21,771 × 12,359.97
  4. Step 4: Simplify right side
    15,769.98x = 269,088,906.87
  5. Step 5: Solve for x
    x = 269,088,906.87/15,769.98
  6. Step 6: Final answer
    x = 17,063.36

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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.