Home / 15,530.29-21,431.84-8,456.75

Finding the Fourth Proportional to 15,530.29, 21,431.84 and 8,456.75

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Solution

The fourth proportional to 15,530.29, 21,431.84 and 8,456.75 is: 11,670.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.29 : 21,431.84 = 8,456.75 : x
  2. Step 2: Convert to fraction form
    15,530.29/21,431.84 = 8,456.75/x
  3. Step 3: Cross multiply
    15,530.29x = 21,431.84 × 8,456.75
  4. Step 4: Simplify right side
    15,530.29x = 181,243,712.92
  5. Step 5: Solve for x
    x = 181,243,712.92/15,530.29
  6. Step 6: Final answer
    x = 11,670.34

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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.