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Finding the Fourth Proportional to 15,229.92, 21,015.60 and 8,605.92

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Solution

The fourth proportional to 15,229.92, 21,015.60 and 8,605.92 is: 11,875.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.92 : 21,015.60 = 8,605.92 : x
  2. Step 2: Convert to fraction form
    15,229.92/21,015.60 = 8,605.92/x
  3. Step 3: Cross multiply
    15,229.92x = 21,015.60 × 8,605.92
  4. Step 4: Simplify right side
    15,229.92x = 180,858,572.35
  5. Step 5: Solve for x
    x = 180,858,572.35/15,229.92
  6. Step 6: Final answer
    x = 11,875.21

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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.