Home / 15,529.91-21,431.30-8,456.36

Finding the Fourth Proportional to 15,529.91, 21,431.30 and 8,456.36

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Solution

The fourth proportional to 15,529.91, 21,431.30 and 8,456.36 is: 11,669.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.91 : 21,431.30 = 8,456.36 : x
  2. Step 2: Convert to fraction form
    15,529.91/21,431.30 = 8,456.36/x
  3. Step 3: Cross multiply
    15,529.91x = 21,431.30 × 8,456.36
  4. Step 4: Simplify right side
    15,529.91x = 181,230,638.63
  5. Step 5: Solve for x
    x = 181,230,638.63/15,529.91
  6. Step 6: Final answer
    x = 11,669.78

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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.