Home / 15,530.69-21,431.76-8,456.96

Finding the Fourth Proportional to 15,530.69, 21,431.76 and 8,456.96

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Solution

The fourth proportional to 15,530.69, 21,431.76 and 8,456.96 is: 11,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.69 : 21,431.76 = 8,456.96 : x
  2. Step 2: Convert to fraction form
    15,530.69/21,431.76 = 8,456.96/x
  3. Step 3: Cross multiply
    15,530.69x = 21,431.76 × 8,456.96
  4. Step 4: Simplify right side
    15,530.69x = 181,247,558.92
  5. Step 5: Solve for x
    x = 181,247,558.92/15,530.69
  6. Step 6: Final answer
    x = 11,670.28

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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.