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Finding the Fourth Proportional to 8,965.92, 13,529.76 and 8,640.48

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Solution

The fourth proportional to 8,965.92, 13,529.76 and 8,640.48 is: 13,038.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,965.92 : 13,529.76 = 8,640.48 : x
  2. Step 2: Convert to fraction form
    8,965.92/13,529.76 = 8,640.48/x
  3. Step 3: Cross multiply
    8,965.92x = 13,529.76 × 8,640.48
  4. Step 4: Simplify right side
    8,965.92x = 116,903,620.68
  5. Step 5: Solve for x
    x = 116,903,620.68/8,965.92
  6. Step 6: Final answer
    x = 13,038.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.