Home / 15,529.76-21,431.32-8,456.19

Finding the Fourth Proportional to 15,529.76, 21,431.32 and 8,456.19

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Solution

The fourth proportional to 15,529.76, 21,431.32 and 8,456.19 is: 11,669.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.76 : 21,431.32 = 8,456.19 : x
  2. Step 2: Convert to fraction form
    15,529.76/21,431.32 = 8,456.19/x
  3. Step 3: Cross multiply
    15,529.76x = 21,431.32 × 8,456.19
  4. Step 4: Simplify right side
    15,529.76x = 181,227,313.87
  5. Step 5: Solve for x
    x = 181,227,313.87/15,529.76
  6. Step 6: Final answer
    x = 11,669.68

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Half scale
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Double scale
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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.