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Finding the Fourth Proportional to 18,200.16, 25,110 and 11,128.32

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Solution

The fourth proportional to 18,200.16, 25,110 and 11,128.32 is: 15,353.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,200.16 : 25,110 = 11,128.32 : x
  2. Step 2: Convert to fraction form
    18,200.16/25,110 = 11,128.32/x
  3. Step 3: Cross multiply
    18,200.16x = 25,110 × 11,128.32
  4. Step 4: Simplify right side
    18,200.16x = 279,432,115.20
  5. Step 5: Solve for x
    x = 279,432,115.20/18,200.16
  6. Step 6: Final answer
    x = 15,353.28

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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.