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Finding the Fourth Proportional to 18,695.28, 28,043.01 and 4,655.30

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Solution

The fourth proportional to 18,695.28, 28,043.01 and 4,655.30 is: 6,982.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.28 : 28,043.01 = 4,655.30 : x
  2. Step 2: Convert to fraction form
    18,695.28/28,043.01 = 4,655.30/x
  3. Step 3: Cross multiply
    18,695.28x = 28,043.01 × 4,655.30
  4. Step 4: Simplify right side
    18,695.28x = 130,548,484.24
  5. Step 5: Solve for x
    x = 130,548,484.24/18,695.28
  6. Step 6: Final answer
    x = 6,982.96

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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.