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Finding the Fourth Proportional to 18,801.45, 28,203.01 and 10,475.15

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Solution

The fourth proportional to 18,801.45, 28,203.01 and 10,475.15 is: 15,713.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.45 : 28,203.01 = 10,475.15 : x
  2. Step 2: Convert to fraction form
    18,801.45/28,203.01 = 10,475.15/x
  3. Step 3: Cross multiply
    18,801.45x = 28,203.01 × 10,475.15
  4. Step 4: Simplify right side
    18,801.45x = 295,430,760.20
  5. Step 5: Solve for x
    x = 295,430,760.20/18,801.45
  6. Step 6: Final answer
    x = 15,713.19

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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.