Home / 15,403.92-21,257.40-8,330.34

Finding the Fourth Proportional to 15,403.92, 21,257.40 and 8,330.34

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Solution

The fourth proportional to 15,403.92, 21,257.40 and 8,330.34 is: 11,495.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.92 : 21,257.40 = 8,330.34 : x
  2. Step 2: Convert to fraction form
    15,403.92/21,257.40 = 8,330.34/x
  3. Step 3: Cross multiply
    15,403.92x = 21,257.40 × 8,330.34
  4. Step 4: Simplify right side
    15,403.92x = 177,081,369.52
  5. Step 5: Solve for x
    x = 177,081,369.52/15,403.92
  6. Step 6: Final answer
    x = 11,495.86

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Half scale
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Double scale
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Similar ratio
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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.