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Finding the Fourth Proportional to 18,735.20, 28,102.80 and 7,051.04

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Solution

The fourth proportional to 18,735.20, 28,102.80 and 7,051.04 is: 10,576.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.20 : 28,102.80 = 7,051.04 : x
  2. Step 2: Convert to fraction form
    18,735.20/28,102.80 = 7,051.04/x
  3. Step 3: Cross multiply
    18,735.20x = 28,102.80 × 7,051.04
  4. Step 4: Simplify right side
    18,735.20x = 198,153,966.91
  5. Step 5: Solve for x
    x = 198,153,966.91/18,735.20
  6. Step 6: Final answer
    x = 10,576.56

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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.