Home / 15,529.92-21,431.68-8,456.74

Finding the Fourth Proportional to 15,529.92, 21,431.68 and 8,456.74

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Solution

The fourth proportional to 15,529.92, 21,431.68 and 8,456.74 is: 11,670.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.92 : 21,431.68 = 8,456.74 : x
  2. Step 2: Convert to fraction form
    15,529.92/21,431.68 = 8,456.74/x
  3. Step 3: Cross multiply
    15,529.92x = 21,431.68 × 8,456.74
  4. Step 4: Simplify right side
    15,529.92x = 181,242,145.52
  5. Step 5: Solve for x
    x = 181,242,145.52/15,529.92
  6. Step 6: Final answer
    x = 11,670.51

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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.