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Finding the Fourth Proportional to 18,859.10, 28,245.55 and 9,005.28

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Solution

The fourth proportional to 18,859.10, 28,245.55 and 9,005.28 is: 13,487.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.10 : 28,245.55 = 9,005.28 : x
  2. Step 2: Convert to fraction form
    18,859.10/28,245.55 = 9,005.28/x
  3. Step 3: Cross multiply
    18,859.10x = 28,245.55 × 9,005.28
  4. Step 4: Simplify right side
    18,859.10x = 254,359,086.50
  5. Step 5: Solve for x
    x = 254,359,086.50/18,859.10
  6. Step 6: Final answer
    x = 13,487.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.