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Finding the Fourth Proportional to 18,608.64, 25,680.96 and 10,649.04

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Solution

The fourth proportional to 18,608.64, 25,680.96 and 10,649.04 is: 14,696.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.64 : 25,680.96 = 10,649.04 : x
  2. Step 2: Convert to fraction form
    18,608.64/25,680.96 = 10,649.04/x
  3. Step 3: Cross multiply
    18,608.64x = 25,680.96 × 10,649.04
  4. Step 4: Simplify right side
    18,608.64x = 273,477,570.28
  5. Step 5: Solve for x
    x = 273,477,570.28/18,608.64
  6. Step 6: Final answer
    x = 14,696.27

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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.